Synthesis and Properties of Conformationally Constrained Analogues of Floral-Type Odorants
作者:Serge Lamboley、Cédric Morel、Jean-Yves de Saint Laumer、André F. Boschung、Nigel G. J. Richards、Béat M. Winter
DOI:10.1002/hlca.200490159
日期:2004.7
bridged analogues 8–19 of floral-typeodorants related to cyclamenaldehyde (1) were synthesized (Schemes 1–5) to investigate the relationship between the structural and conformational features of these compounds and their odor properties. Comparison of the data from sensory evaluation and molecular modeling suggests that the side chain of both the unconstrained and the constrained active analogues is not
Catalytic Asymmetric Inverse‐Electron‐Demand Diels–Alder Reactions of 2‐Pyrones with Indenes: Total Syntheses of Cephanolides A and B
作者:Yang Lu、Meng‐Meng Xu、Zhi‐Mao Zhang、Junliang Zhang、Quan Cai
DOI:10.1002/anie.202112223
日期:2021.12.13
Catalyticasymmetric all-carbon-based inverse-electron-demand Diels–Alderreactions of 2-pyrones with electronically unbiased indenes have been realized. This method enables the rapid and enantioselective construction of a wide range of hexahydrofluorenyl bridged-lactone scaffolds. Based on this method, asymmetric total syntheses of cephanolides A and B have been accomplished.