Choay; Monneret; Narcisse, European Journal of Medicinal Chemistry, 1980, vol. 15, # 5, p. 419 - 423
作者:Choay、Monneret、Narcisse、Bakri-Logeais
DOI:——
日期:——
Benedetti, M. O. Violeta; Burton, Gerardo, Organic Preparations and Procedures International, 1992, vol. 24, # 6, p. 701 - 704
作者:Benedetti, M. O. Violeta、Burton, Gerardo
DOI:——
日期:——
Oxidative Cyclization of Iodo Ketones. Synthesis of 6-Oxa-5α-pregnane-3,20-dione
作者:Daniel Nicoletti、Alberto A. Ghini、Gerardo Burton
DOI:10.1021/jo960108q
日期:1996.1.1
The steroidal delta- and gamma-iodo ketones 1 and 9 were converted to the cyclic hemiketals 3 and 10, by oxidation to the iodoso derivatives with m-CPBA. Spontaneous cyclization of the latter intermediates to the corresponding oxocarbenium ions, followed by stereoselective addition of water, rendered the hemiketals. Depending on the reaction conditions, the five-membered oxocarbenium ion derived from