Singlet Oxygen Addition to Chiral Allylic Alcohols and Subsequent Peroxyacetalization with...

1
2007 Other 6-membered heterocycles R 0670 Singlet Oxygen Addition to Chiral Allylic Alcohols and Subsequent Peroxyacetal- ization with β-Naphthaldehyde: Synthesis of Diastereomerically Pure 3-β-Naph- thyl-Substituted 1,2,4-Trioxanes. — The title method involves a sequence of a singlet oxygen ene reaction of allylic alcohols in dye-crosslinked polystyrene beads containing the porphyrin sensitizer, and the BF3·OEt2 catalyzed peroxyacetalization reaction of β-naphthaldehyde as model compound for aromatic carbonyl compounds with the diastereomeric mixtures of the generated β-hydroperoxy alcohols. The peroxyacetal- ization reaction affords cross-peroxyacetalization side products in each case, but these products are isolated only from the reaction mixture of cyclohexyl derivative (IId). — (GRIESBECK*, A. G.; EL-IDREESY, T. T.; LEX, J.; Tetrahedron 62 (2006) 46, 10615-10622; Inst. Org. Chem., Univ. Koeln, D-50939 Koeln, Germany; Eng.) — Klein 07- 145

Transcript of Singlet Oxygen Addition to Chiral Allylic Alcohols and Subsequent Peroxyacetalization with...

Page 1: Singlet Oxygen Addition to Chiral Allylic Alcohols and Subsequent Peroxyacetalization with β-Naphthaldehyde: Synthesis of Diastereomerically Pure 3-β-Naphthyl-Substituted 1,2,4-Trioxanes.

2007

Other 6-membered heterocyclesR 0670 Singlet Oxygen Addition to Chiral Allylic Alcohols and Subsequent Peroxyacetal-

ization with β-Naphthaldehyde: Synthesis of Diastereomerically Pure 3-β-Naph-thyl-Substituted 1,2,4-Trioxanes. — The title method involves a sequence of a singlet oxygen ene reaction of allylic alcohols in dye-crosslinked polystyrene beads containing the porphyrin sensitizer, and the BF3·OEt2 catalyzed peroxyacetalization reaction of β-naphthaldehyde as model compound for aromatic carbonyl compounds with thediastereomeric mixtures of the generated β-hydroperoxy alcohols. The peroxyacetal-ization reaction affords cross-peroxyacetalization side products in each case, but these products are isolated only from the reaction mixture of cyclohexyl derivative (IId). — (GRIESBECK*, A. G.; EL-IDREESY, T. T.; LEX, J.; Tetrahedron 62 (2006) 46, 10615-10622; Inst. Org. Chem., Univ. Koeln, D-50939 Koeln, Germany; Eng.) — Klein

07- 145

Supplementary Information fileIt is instructive to derive the Meir-Wingreen formula Supplementary Equation 3 from the general Kubo formula Eq. (23), since the subsequent generalization

Supplementary Information fileIt is instructive to derive the Meir-Wingreen formula Supplementary Equation 3 from the general Kubo formula Eq. (23), since the subsequent generalization

Teory of Mass Spectrometry - Website Personal - Institut ...personal.its.ac.id/files/material/3022-beckers-chem-MS... · Teory of Mass Spectrometry Taslim Ersam ... subsequent fragmentation

Teory of Mass Spectrometry - Website Personal - Institut ...personal.its.ac.id/files/material/3022-beckers-chem-MS... · Teory of Mass Spectrometry Taslim Ersam ... subsequent fragmentation

Carotenoids in Photosynthesis quenching triplet (B)Chl excited states direct role in scavenging of singlet oxygen deactivation of Chl excited states (NPQ)

Carotenoids in Photosynthesis quenching triplet (B)Chl excited states direct role in scavenging of singlet oxygen deactivation of Chl excited states (NPQ)

Tirapazamine Sensitizes Hepatocellular Carcinoma Cells to Topoisomerase … · 2013. 12. 20. · Tirapazamine (TPZ, 3-amino-1,2,4-benzotriazine 1,4 dioxide, SR4233) is a bioreductive

Tirapazamine Sensitizes Hepatocellular Carcinoma Cells to Topoisomerase … · 2013. 12. 20. · Tirapazamine (TPZ, 3-amino-1,2,4-benzotriazine 1,4 dioxide, SR4233) is a bioreductive

 · u) Any claim which fal s under any exclusion as shown in the First Schedule — Insurance Certificate of this Policy or in any subsequent amendment or endorsements. In addition

 · u) Any claim which fal s under any exclusion as shown in the First Schedule — Insurance Certificate of this Policy or in any subsequent amendment or endorsements. In addition

Η ΕΠΙΣΤΟΛΗ - Neokoroi · Demeter’s subsequent wrath. There is a fragment in which Demeter makes Her way to a fountain after the rape, and upon seeing the water, which recalls

Η ΕΠΙΣΤΟΛΗ - Neokoroi · Demeter’s subsequent wrath. There is a fragment in which Demeter makes Her way to a fountain after the rape, and upon seeing the water, which recalls

Θέματα Πανελληνίων Βιολογία Κατευθυνσης ανα Θέμα (Κεφ 1,2,4)

Θέματα Πανελληνίων Βιολογία Κατευθυνσης ανα Θέμα (Κεφ 1,2,4)

transfer complexes of 1H-1,2,4

transfer complexes of 1H-1,2,4

Klas Katharina 1...Klas Katharina 4 Kelley et al. 2019 PMID: 31284572 • priming signal provided by microbial components / endogenous cytokines • Activation of TF NF-kappaB & subsequent

Klas Katharina 1...Klas Katharina 4 Kelley et al. 2019 PMID: 31284572 • priming signal provided by microbial components / endogenous cytokines • Activation of TF NF-kappaB & subsequent

Supporting Information · PNBDO-TriT 78540 72664 139389 153873 276069 420239 2.1176 a) GPC versus polystyrene standards in 1,2,4-trichlorobenzene at 150 °C. Table S2 UPS spectra

Supporting Information · PNBDO-TriT 78540 72664 139389 153873 276069 420239 2.1176 a) GPC versus polystyrene standards in 1,2,4-trichlorobenzene at 150 °C. Table S2 UPS spectra

2 and apoptosis in mosquito salivary glandssalivary glands (SGs), from where they are expectorated with saliva during subsequent bites. 87. Despite the critical role of SGs in transmission,

2 and apoptosis in mosquito salivary glandssalivary glands (SGs), from where they are expectorated with saliva during subsequent bites. 87. Despite the critical role of SGs in transmission,

σ-Bond Hydroboration of Cyclopropanes · Hydroboration of alkenes is a classical reaction in organic synthesis, in which alkenes react with boranes to give alkylboranes, with subsequent

σ-Bond Hydroboration of Cyclopropanes · Hydroboration of alkenes is a classical reaction in organic synthesis, in which alkenes react with boranes to give alkylboranes, with subsequent

New synthesis of 3-(β-D-glucopyranosyl)-5-substituted-1,2 ...real.mtak.hu/28931/1/New_synthesis_of_3__D_glucopyranosyl_5... · Accepted Manuscript New synthesis of 3-(β-D-glucopyranosyl)-5-substituted-1,2,4-triazoles,

New synthesis of 3-(β-D-glucopyranosyl)-5-substituted-1,2 ...real.mtak.hu/28931/1/New_synthesis_of_3__D_glucopyranosyl_5... · Accepted Manuscript New synthesis of 3-(β-D-glucopyranosyl)-5-substituted-1,2,4-triazoles,

Dr. Josh Flohr - Evaluating Maternal Vitamin D Supplementation on Sow and Subsequent Pig Performance

Dr. Josh Flohr - Evaluating Maternal Vitamin D Supplementation on Sow and Subsequent Pig Performance

Preliminary singlet doublet_dm_gce

Preliminary singlet doublet_dm_gce

THREE QUARKS: u, d, s Precursor 1: Sakata Model Precursor ...korytov/phz4390/note_20_three_quarks.pdf · η' ≈ (⎯uu +⎯dd +⎯ss ) / √3 (fully symmetric singlet) η ≈ (⎯uu

THREE QUARKS: u, d, s Precursor 1: Sakata Model Precursor ...korytov/phz4390/note_20_three_quarks.pdf · η' ≈ (⎯uu +⎯dd +⎯ss ) / √3 (fully symmetric singlet) η ≈ (⎯uu

b1 · 2020. 7. 31. · 3 this case, a contact LEC, called h 2;S in this reference, was naturally introduced to account for the conversion of a spin-singlet dibaryon with I 3 = 1 to

b1 · 2020. 7. 31. · 3 this case, a contact LEC, called h 2;S in this reference, was naturally introduced to account for the conversion of a spin-singlet dibaryon with I 3 = 1 to

Your Questions ?? α-bromoethylbenzene Answers to MiniQuiz 4: α-dibromoethylbenzene: one singlet and groups of aromatics Quartet 1:3:3:1 ! Score: 2*/2.

Your Questions ?? α-bromoethylbenzene Answers to MiniQuiz 4: α-dibromoethylbenzene: one singlet and groups of aromatics Quartet 1:3:3:1 ! Score: 2*/2.

Experimental Status of Deuteron F L Structure Function and Extractions of the Deuteron and Non-Singlet Moments Ibrahim H. Albayrak Hampton University.

Experimental Status of Deuteron F L Structure Function and Extractions of the Deuteron and Non-Singlet Moments Ibrahim H. Albayrak Hampton University.

NanoQuant Plate · 2 Measuring with the NanoQuant Plate Blanking What is Individual Blanking? Individual Blanking means that each well that is to be used for subsequent sample measurement

NanoQuant Plate · 2 Measuring with the NanoQuant Plate Blanking What is Individual Blanking? Individual Blanking means that each well that is to be used for subsequent sample measurement