The intramolecular Baylis–Hillman reaction: easy preparation of versatile substrates, facile reactions, and synthetic applications
作者:Jung Eun Yeo、Xiuling Yang、Hee Jin Kim、Sangho Koo
DOI:10.1039/b311951c
日期:——
We have developed a general and highly efficient method for the preparation of diverse [small omega]-formyl-[small alpha],[small beta]-unsaturated carbonyl compounds and optimized the conditions for the intramolecular Baylis-Hillman reactions of these compounds to provide various biologically important polycyclic compounds.
Synthetic organic photochemistry: macrolides from the photolysis of βγ-epoxy-ketones
作者:Robert G. Carlson、Joan Harman-Ashley Huber、David E. Henton
DOI:10.1039/c39730000223
日期:——
The photolysis of 2-(oxiranyl)cycloalkanones is shown to be a useful method for the synthesis of unsaturated macrolides by a three-atom photochemical ring expansion.
2-(环氧乙烷基)环烷酮的光解被证明是通过三原子光化学扩环合成不饱和大环内酯的有用方法。
Organocatalytic Double Michael Reaction of 7-Oxohept-2-enoates and Nitrostyrene – Formal Synthesis of (–)-α- and (–)-β-Lycorane
作者:Bor-Cherng Hong、Roshan Y. Nimje、Ming-Fun Wu、Amit A. Sadani
DOI:10.1002/ejoc.200701122
日期:2008.3
Organocatalytic conjugate addition of 7-oxohept-2-enoate to nitrostyrene provided an ω-nitro-α,β-unsaturated ester. Subsequent intramolecular cyclization afforded the highly functionalized cyclohexane carboester with four stereogenic centers with high diastereoselectivity and high enantioselectivity (>99 % ee). Some adducts were transformed into the intermediates of the synthesis of (–)-α- and (–)-β-lycorane