ChemInform Abstract: Reversible Diastereoselective Photocyclization of Phenylglyoxylamides of...

1
2002 amino acids, peptides amino acids, peptides U 0400 19 - 187 Reversible Diastereoselective Photocyclization of Phenylglyoxy- lamides of α-Amino Acid Methyl Esters to 3-Hydroxy β-Lactams. — Phenylglyoxylamides (III) are easily available by condensation of amino esters (I) with phenylglyoxylic acid. Their irradiation at λ = 300 nm results in cyclization to β-lactams in high yields. The cyclization is completely reversible in the absence of trace amounts of acid. — (GRIESBECK, AXEL G.; HECKROTH, HEIKE; Synlett (2002) 1, 131-133; Inst. Org. Chem., Univ. Koeln, D-50939 Koeln, Germany; EN) 1

Transcript of ChemInform Abstract: Reversible Diastereoselective Photocyclization of Phenylglyoxylamides of...

Page 1: ChemInform Abstract: Reversible Diastereoselective Photocyclization of Phenylglyoxylamides of α-Amino Acid Methyl Esters to 3-Hydroxy β-Lactams.

2002 amino acids, peptides

amino acids, peptidesU 0400

19 - 187Reversible Diastereoselective Photocyclization of Phenylglyoxy-lamides of α-Amino Acid Methyl Esters to 3-Hydroxy β-Lactams.— Phenylglyoxylamides (III) are easily available by condensation of aminoesters (I) with phenylglyoxylic acid. Their irradiation at λ = 300 nm resultsin cyclization to β-lactams in high yields. The cyclization is completelyreversible in the absence of trace amounts of acid. — (GRIESBECK, AXELG.; HECKROTH, HEIKE; Synlett (2002) 1, 131-133; Inst. Org. Chem., Univ.Koeln, D-50939 Koeln, Germany; EN)

1

Enantio- and Diastereoselective Addition of Cyclohexyl ...Enantio- and Diastereoselective Addition of Cyclohexyl ... prior to use. Cyclopentyl methyl ether was additionally ... The

Enantio- and Diastereoselective Addition of Cyclohexyl ...Enantio- and Diastereoselective Addition of Cyclohexyl ... prior to use. Cyclopentyl methyl ether was additionally ... The

Erhaltung von Energie, Impuls und Drehimpuls. Inhalt Zusammenfassung der Erhaltungssätze: Impulserhaltung Drehimpulserhaltung Energieerhaltung –Reversible.

Erhaltung von Energie, Impuls und Drehimpuls. Inhalt Zusammenfassung der Erhaltungssätze: Impulserhaltung Drehimpulserhaltung Energieerhaltung –Reversible.

Βλάβη xπανα v v xιώσ xως (reperfusion injury) και απόπληκ ... · Morphology of Cell Injury Reversible: Cellular swelling and vacuole (κνοόπια ) formation

Βλάβη xπανα v v xιώσ xως (reperfusion injury) και απόπληκ ... · Morphology of Cell Injury Reversible: Cellular swelling and vacuole (κνοόπια ) formation

Temporary left ventricular assist device for complete ...€¦ · Temporary left ventricular assist device for complete recovery from reversible acute heart failure due to tumor necrosis

Temporary left ventricular assist device for complete ...€¦ · Temporary left ventricular assist device for complete recovery from reversible acute heart failure due to tumor necrosis

Electronic Structures and Spin Topologies of γ-Picoliniumyl ...glaserr/vitpub/JPCA_pico...Radicals resulting from one-electron reduction of (N-methylpyridinium-4-yl) methyl esters

Electronic Structures and Spin Topologies of γ-Picoliniumyl ...glaserr/vitpub/JPCA_pico...Radicals resulting from one-electron reduction of (N-methylpyridinium-4-yl) methyl esters

β-Keto esters from ketones and ethyl chloroformate: a rapid, general ...

β-Keto esters from ketones and ethyl chloroformate: a rapid, general ...

A Reversible Abstract Machine

A Reversible Abstract Machine

Rigid Families for the Reversible -calculus

Rigid Families for the Reversible -calculus

Metastability in the reversible inclusion process€¦ · Metastability in the reversible inclusion process Sander Dommers Work in progress jointly with Alessandra Bianchi and Cristian

Metastability in the reversible inclusion process€¦ · Metastability in the reversible inclusion process Sander Dommers Work in progress jointly with Alessandra Bianchi and Cristian

Adrenergic Antagonist (Sympatholytics) Inhibition of sympathetic system by blocking: Adrenergic receptors (reversible or irreversible blocking of α.

Adrenergic Antagonist (Sympatholytics) Inhibition of sympathetic system by blocking: Adrenergic receptors (reversible or irreversible blocking of α.

Diastereoselective and enantioselective conjugate addition ... · Diastereoselective and enantioselective conjugate addition ... and enantioselective conjugate addition reactions

Diastereoselective and enantioselective conjugate addition ... · Diastereoselective and enantioselective conjugate addition ... and enantioselective conjugate addition reactions

ECTS - upatras.gr · chloroethyl)aminocinnamic acid and four new homo-aza-steroidal esters induce chromosomal abnormalities and affect protein synthesis in human lymphocytes in vitro”.

ECTS - upatras.gr · chloroethyl)aminocinnamic acid and four new homo-aza-steroidal esters induce chromosomal abnormalities and affect protein synthesis in human lymphocytes in vitro”.

DFT Study of the Formation of α -Chloro Pyruvic Esters ... · Figure 6: Structure of the α-chloroglycidic esters optimized by the DFT method. From the values in Table 1, we can

DFT Study of the Formation of α -Chloro Pyruvic Esters ... · Figure 6: Structure of the α-chloroglycidic esters optimized by the DFT method. From the values in Table 1, we can

Reaction kinetic pathway of reversible and irreversible ... · Reaction kinetic pathway of reversible and irreversible thermal denaturation of -lactoglobulin AlexanderT *,UlrichK

Reaction kinetic pathway of reversible and irreversible ... · Reaction kinetic pathway of reversible and irreversible thermal denaturation of -lactoglobulin AlexanderT *,UlrichK

Direct enantio- and diastereoselective Mannich …1 Direct enantio- and diastereoselective Mannich reactions of malonate and β-keto esters with N-Boc andN-Cbz aldimines catalysed

Direct enantio- and diastereoselective Mannich …1 Direct enantio- and diastereoselective Mannich reactions of malonate and β-keto esters with N-Boc andN-Cbz aldimines catalysed

Organic Chemistry II / CHEM 252 Chapter 19 – Synthesis and ...alpha.chem.umb.edu/chemistry/ch252/files/Overheads/Lecture_Chapter... · • Esters with one αhydrogen can react in

Organic Chemistry II / CHEM 252 Chapter 19 – Synthesis and ...alpha.chem.umb.edu/chemistry/ch252/files/Overheads/Lecture_Chapter... · • Esters with one αhydrogen can react in

Funktionelle und strukturelle Untersuchungen der · zyklisch permutierte Genome ... reversible Adsorption des Phagenpartikels erfolgt über ... Genprodukt ModA eine wesentliche Rolle

Funktionelle und strukturelle Untersuchungen der · zyklisch permutierte Genome ... reversible Adsorption des Phagenpartikels erfolgt über ... Genprodukt ModA eine wesentliche Rolle

Development of the titanium–TADDOLate-catalyzed ......carbon centers [2,19,20]. Initially, chiral auxiliary approaches and diastereoselective reactions were developed, before Differ-ding

Development of the titanium–TADDOLate-catalyzed ......carbon centers [2,19,20]. Initially, chiral auxiliary approaches and diastereoselective reactions were developed, before Differ-ding

Cardiomyocyte-specificIκB kinase (IKK)/NF- B activation ... fileCardiomyocyte-specificIκB kinase (IKK)/NF-κB activation induces reversible inflammatory cardiomyopathy and heart

Cardiomyocyte-specificIκB kinase (IKK)/NF- B activation ... fileCardiomyocyte-specificIκB kinase (IKK)/NF-κB activation induces reversible inflammatory cardiomyopathy and heart

Biodiesel according to ASTM D6584 · 2016. 9. 11. · Biodiesel according to ASTM D6584 Application Note Energy & Fuels Introduction Analysis of biodiesel (fatty acid methyl esters)

Biodiesel according to ASTM D6584 · 2016. 9. 11. · Biodiesel according to ASTM D6584 Application Note Energy & Fuels Introduction Analysis of biodiesel (fatty acid methyl esters)