Antiproliferative Hybrid Analogs of the Hormone 1α,25-Dihydroxyvitamin D<sub>3</sub>: Design, Synthesis, and Preliminary Biological Evaluation
作者:Gary H. Posner、Jae Kyoo Lee、M. Christina White、Richard H. Hutchings、Haiyan Dai、Joseph L. Kachinski、Patrick Dolan、Thomas W. Kensler
DOI:10.1021/jo970049w
日期:1997.5.1
dichloride promotes highly regioselective and stereoselective Diels-Alder cycloaddition between 3-bromo-2-pyrone, prepared in a new way, and unactivated terminal alkene 4-(tert-butyldimethylsiloxy)-1-butene. The conjugate base of A-ring allylic phosphine oxide 20 adds chemospecifically to the C-8 keto group of some C-8,C-24-diketones to form directly metabolically resistant 24-oxo analogs of 1alpha,25-dihydroxyvitamin