Traceless Solid-Phase Synthesis of Heterosteroid Framework
作者:Bor-Cherng Hong、Zhong-Yi Chen、Wei-Hung Chen
DOI:10.1021/ol006180z
日期:2000.8.1
[reaction: see text]A traceless solid-phase synthesis of cyclopenta[c]-4H-chromen-8-ol, benzo[d]cyclopenta[e]-3H-3-azin-8-ol, and other 11-heterosteroids via the fulvene hetero [6 + 3] cycloaddition is described.
Unprecedented and novel hetero [6+3] cycloadditions of fulvene: a facile synthesis of the 11-oxasteroid framework
作者:Bor-Cherng Hong、Hsu-I Sun、Zhong-Yi Chen
DOI:10.1039/a906877e
日期:——
In contrast to the Diels–Alder reaction of fulvenes and benzoquinone, 6-dimethylaminofulvene reacts with benzoquinones to give the hetero [6+3] cycloaddition adduct, constituting an efficient and novel route to cyclopenta[c]chromenes including 11-oxasteroids.
Traceless Solid-Phase Synthesis of Cyclopenta[<i>c</i>]quinolines and Cyclopenta[<i>c</i>]chromenes via Hetero [6+3] Cycloadditions of Fulvene. A Facile Approach to the 11-Heterosteroids Framework
作者:Bor-Cherng Hong、Zhong-Yi Chen、Wei-Hung Chen、Hsu-I Sun、Gene-Hsiang Lee
DOI:10.1002/jccs.200500028
日期:2005.2
The hetero [6+3] cycloaddition of fulvenes to benzoquinones and iodoanilines provides an efficient route to the synthesis of cyclopenta[c]-4H-chromen-8-ol, benzo[d]cyclopenta[e]-3H-3-azin-8-ol and other 11hetero steroids. The structure of the cyclopenta[c]chromene skeleton was confirmed by the X-ray structure analysis of the p-bromobenzoate of 39. A small library consisting of 110 examples was prepared