Optically Active Triptycenes. IV. Synthesis of Optically Active 2- or 5-Substituted 7-Carboxytriptycenes
作者:Yoshiteru Sakata、Fumio Ogura、Masazumi Nakagawa
DOI:10.1246/bcsj.46.611
日期:1973.2
Starting from anthraquinone-1-carboxylic acid (I), 2-methoxy- and 5-methoxy-7-carboxytriptycenes (VIIa and VIIb) have been synthesized. Optical resolution of the triptycenecarboxylic acids with brucine afforded (+)-VIIa and (+)-VIIb. The absolute configuration of (+)-VIIa was determined to be 1R,6R by the chemical correlation with (+)-2,5-dimethoxy-7-methoxycarbonyltriptycene. From a comparison of
以蒽醌-1-羧酸 (I) 为原料,已经合成了 2-甲氧基-和 5-甲氧基-7-羧基三烯 (VIIa 和 VIIb)。用丁香碱对三苯甲酸进行光学拆分,得到 (+)-VIIa 和 (+)-VIIb。(+)-VIIa 的绝对构型通过与 (+)-2,5-二甲氧基-7-甲氧基羰基三苯甲基的化学相关性确定为 1R,6R。从 (+)-5-甲氧基-7-羧基三烯 (VIIb) 的 CD 光谱与 (+)-2-乙酰氧基-5-甲氧基-7-甲氧基羰基三烯 (XIIIb) 的 CD 光谱的比较来看,1R,6R 绝对构型为分配给 (+)-VIIb。(+)-2-Hydroxy-5-phenylazo-7-carboxytriptycene (XIIa) 衍生自 (+)-VIIa。(+)-2-氯-和(+)-5-氯-7-羧基三苯乙烯(XVIIIa和XVIIIb)已经由5-氯-和8-氯-1-羧基蒽醌(XIVa和XIVb)制备。