Two enantiopure pipecolic acid derivatives having an olefinic moiety were synthesized from an intramolecular addition of allyl silanes on an iminium double bond. The iminium moiety was generated via a reaction of chiral β-amino alcohols with glyoxal.
The synthesis of asymmetric 2-indolyl-4-methylenepiperidines 8–11 and 14–15 by condensation of an aminoallylsilane with an indole carbaldehyde, followed by intramolecular cyclization of the intermediate, is described. The reactivity of N-(2-hydroxyethyl)indolylpiperidines 9 and 14 with KtBuO to give indolo[2,3-a]quinolizidines is studied. Some unexpected results are obtained due to the influence of
描述了通过氨基烯丙基硅烷与吲哚甲醛的缩合反应,然后分子内环化中间体,合成不对称的2-吲哚基-4-亚甲基哌啶8-11和14-15。研究了N-(2-羟乙基)吲哚基哌啶9和14与K t BuO的反应生成吲哚并[2,3- a ]喹唑啉。由于α-苯基环的影响,获得了一些出乎意料的结果。