Total Syntheses of (+)-Chloropuupehenone and (+)-Chloropuupehenol and Their Analogues and Evaluation of Their Bioactivities
作者:Duy H. Hua、Xiaodong Huang、Yi Chen、Srinivas K. Battina、Masafumi Tamura、Sang K. Noh、Sung I. Koo、Ichiji Namatame、Hiroshi Tomoda、Elisabeth M. Perchellet、Jean-Pierre Perchellet
DOI:10.1021/jo0491399
日期:2004.9.1
was transformed into (+)-5 and (+)-1. A stepwise stereoselective synthesis of (+)-1 was also developed utilizing an oxyselenylation ring-closure reaction. The synthetic sequence also produced four biologically active naturally occurring drimanic sesquiterpenes, (+)-drimane-8α,11-diol (34), (−)-drimenol (38), (+)-albicanol (39), and (−)-albicanal (31) as intermediates.
四环吡喃(+)-氯普苯酮(1)和(+-氯普苯酚(5)及其C8- R-异构体(+)- 3)是通过1-氯-2-硫代-3的一锅缩合反应合成的, 5,6-三(叔丁基二甲基甲硅烷氧基)苯(8)与(4a S,8a S)-3,4,4a,5,6,7,8,8a-八氢-2,5,5,8a-四甲基萘-1-甲醛(7)。主要缩合产物(4a S,6a R,12b S)-2 H -9,10-双(叔丁基二甲基甲硅烷氧基)-11-氯-1,3,4,4a,5,6,6a,12b-八氢-4,4,6a,12b-四甲基-苯并[ a甲硅烷基(4),经去甲硅烷基化后提供四环吡喃(+)-(4a S,6a R,12b S)-2 H -11-chloro-1,3,4,4a,5,6,6a,12b-八氢-4,4,6a,12b-四甲基-苯并[ a ] x吨-9,10-二醇(3)。在8小时内以42 mg / rat的剂量使用时,吡喃二醇3抑制大鼠肠道中胆