Total synthesis of (−)-eudistomins with an oxathiazepine ring. Part 1. Formation of the oxathiazepine ring system
作者:Masako Nakagawa、Jin-Jun Liu、Tohru Hino、Akihiko Tsuruoka、Naoyuki Harada、Makoto Ariga、Yasunori Asada
DOI:10.1039/b004570p
日期:——
Formation of the oxathiazepine ring in eudistomins 1 was investigated. Thiazolidinyl-β-carboline 5 was successfully transformed into thiaindoloquinolizidine 7, but attempted oxidative transformation of 7 to 1 was not successful. The oxidative cyclization of 1-substituted-2 hydroxy-β-carboline 24 with NCS or the acid-catalyzed cyclization of the corresponding S-oxide 26 with TsOH gave oxathiazepine
研究了eudistomins 1中草硫氮杂pine环的形成。噻唑烷基-β-咔啉5已成功转化为噻吲哚并喹唑烷7,但尝试将7氧化为1却没有成功。氧化性环化NCS取代1-取代-2羟基-β-咔啉24或相应的酸催化环化反应小号氧化物 26用TsOH给草硫氮平 25,其容易地转化为(+)-十溴联苯二胺L(+)- 1f。(-)-Debromoeudistomin L(-)- 1f由N-羟基色胺11和D-半胱氨酸30制备。