Synthesis of (R)-(+)-Tanikolide through Stereospecific C-H Insertion Reaction of Dichlorocarbene with Optically Active Secondary Alcohol Derivatives
作者:Hideki Arasaki、Masashi Iwata、Miyuki Makida、Yukio Masaki
DOI:10.1248/cpb.52.848
日期:——
1,2-glycols, (S)-1,2-isopropylidenedioxytridecane (3) and ethyl (S)-4,5-isopropylidenedioxy-pentanoate (4), prepared from (R)-glyceraldehyde acetonide (2), with dichlorocarbene generated from CHCl(3)/50% NaOH/cetyltrimethylammonium chloride (as ptc.) took place with complete retention of configuration to provide (S)-4-dichloromethyl-2,2-dimethyl-4-undecyl-1,3-dioxolane (5) and ethyl (S)-3-(4-dichloromethyl-2
由(R)-甘油醛制得的受保护的手性1,2-乙二醇,(S)-1,2-异丙基二烯二氧基十三烷(3)和(S)-4,5-异丙基二烯基戊氧基乙酯(4)的立体特异性αCH插入反应与CHCl(3)/ 50%NaOH /鲸蜡基三甲基氯化铵(如ptc。)生成的二氯卡宾进行乙炔化物(2)的构型完全保留,以提供(S)-4-二氯甲基-2,2-二甲基-4-十一烷基-1,3-二氧戊环(5)和(S)-3-(4-二氯甲基-2,2-二甲基-1,3-二氧戊环-4-基)-丙酸酯(8)。酯(8)通过侧链的延长转化为5。将二醇衍生物(5)转化为O-TBDPS保护的(S)-2-羟甲基-2-十一烷基环氧乙烷(16)。