Temperature-Independent Stereocontrolled [2+2] Cycloaddition. Potential of the 2,4-Pentanediol Tether in Asymmetric Reactions as a Differential Activation Entropy Promoter
作者:Takashi Sugimura、Takahiro Tei、Atsushi Mori、Tadashi Okuyama、Akira Tai
DOI:10.1021/ja993976o
日期:2000.3.1
Asymmetric synthesis by vapor phase pyrolysis
作者:Takashi Sugimura、Takahiro Tei、Tadashi Okuyama
DOI:10.1016/s0040-4039(03)00549-5
日期:2003.4
The first vaporphase asymmetric synthesis was successfully carried out by FVP of a 2,4-pentanediol (PD)-tethered substrate carrying cyclohexene and diazo ester moieties at high temperature up to 400°C. The intramolecular [2+2] cycloaddition of the ketene was strictly stereocontrolled by the entropy term.