The formation of isomeric, optically active naphthalene hydrocarbons IIIa and IIIb, with opposite specific rotations, by partial dehydrogenation (with Pd) of sandaracopimaric (I) and of pimaric (II) acids respectively, has been confirmed. The acid I, on treatment with LAH affords the sandaracopimarinol (V), which was oxidized with CrO3 to the corresponding aldehyde VI. The product obtained on condensation
已经证实,通过分别对sandaracopimaric(I)和pimaric(II)酸进行部分脱氢(用Pd),形成了具有相反比旋光度的异构的旋光性
萘烃IIIa和IIIb。用
LAH处理后的酸I生成了三氢
花生四烯酸(V),将其用CrO 3氧化为相应的醛VI。将VI与
乙烷-二
硫醇在脱
硫的阮内
镍上脱
硫后缩合获得的产物提供了重烃,C 20 H 32(IX)。V与
LAH的
甲苯磺酸酯可再生醇V,以及少量的重碳氢化合物C 20 H 34,未进行详细研究。