Axial and Atropisomeric Chirality Synthesis

A novel class of chiral 5,5'-di(2,4,6-trialkyl)aryl salen-metal complexes have been developed and shown to catalyze highly enantioselective Nazarov cyclization reactions, giving rise to cyclopentenoids in 90:10-98:2 er. Significantly, the catalysts also promote, for the first time, highly enantioselective Nazarov reac…

• YUNUS EMRE TÜRKMEN

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• HİLMİ NAMLI

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSymmetry-Driven Synthesis of Indole Alkaloids: Asymmetric Total Syntheses of (+)-Yohimbine, (-)-Yohimbone, (-)-Yohimbane, and (+)-AlloyohimbaneJeffrey Aube, Shomir Ghosh, and Mehmet TanolCite this: J. Am. Chem. Soc. 1994, 116, 20, 9009–9018Publication Date (Print):October 1,…

• MEHMET TANOL

A problem has arisen in using chiral shift reagents (CSR) and chiral solvating agents (CSA) to determine meso and racemic forms of diastereoisomers in which the stereogenic centers of the molecules are separated by achiral spacers. It is found that NMR signals of both meso and racemic forms of diastereoisomers may exh…

• SERKAN YEŞİLOT

A problem has arisen in using chiral shift reagents (CSR) and chiral solvating agents (CSA) to determine meso and racemic forms of diastereoisomers in which the stereogenic centers of the molecules are separated by achiral spacers. It is found that NMR signals of both meso and racemic forms of diastereoisomers may exh…

• SERAP BEŞLİ

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• TALAT BARAN

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• İDRİS SARGIN

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• MURAT KAYA

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• AYFER MENTEŞ

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Various chiral (9-anthryl)carbinol templates undergo Diels-Alder cycloadditions with a variety of symmetric and nonsymmetric dienophiles with excellent pi-facial selectivity and regioselectivity, under both thermal and Lewis acid catalyzed conditions.

• AMITAV SANYAL

2-Adamantyl substituted quinine-squaramide catalyzed aza-Friedel–Crafts reaction of N -carbamate isatin ketimines with naphthol afforded chiral isatin-derived 1,3-aminonaphthols with excellent enantioselectivity up to greater than 99% and quantitative yield.

• CİHANGİR TANYELİ