acid (Bip), were performed by bis-alkylation with cyclization of racemic (R+S)-Boc-[HO]2-Bip-OMe, possessing two phenolic OH groups at the 6,6′-positions of the biphenyl frame of Bip, using (+)-(R)- and (−)-(S)-Binol[(OCH2CH2)2OTs]2 (2,2′-bis[5-tosyloxy-3-oxa-1-pentyloxy]-1,1′-binaphthyl), respectively, as the alkylating agent followed by chromatographic separation. Two series of terminally protected
的末端的保护,冠,所述合成Ç α -tetrasubstitutedα
氨基与仅轴向手性,所述两种非对映的Boc-(酸小号)-Bip [([R)-BINO
L-22-C-6] -OMe和的Boc- (R)-Bip [(R)-Bino
L-22-C-6] -OMe和它们各自的对映异构体Boc-(R)-Bip [(S)-Bino
L-22-C-6] -OMe和Boc- (S)-Bip [(S)-Bino
L-22-C-6] -OMe,均衍生自2',1':1,2; 通过双烷基化和外消旋(R + S)-Boc- [HO]的环化反应,进行1'',2'':3,4-dibenzcyclohepta-1,3-diene-6-amino-6-
羧酸(Bip)] 2-Bip-OMe,使用(+)-(R)-和(-)-(S)-Binol [(OCH 2 CH 2)2 OTs] 2(2,2'-双[5-
甲苯磺酰氧基-3-氧杂-1-戊氧基]