The C-unsubstituted 3-benzoheteroepines (2a-g) containing group 15 (P, As, Sb, and Bi) and group 16 (S, Se, and Te) heavier elements were prepared by the reaction of the corresponding metal reagents with (Z,Z)-o-bis(beta-lithiovinyl)benzene (5) which was derived in two steps from a common o-phthalaldehyde (3). The heteroepines (2) thus obtained were thermally labile towards heteroatom extrusion, and
通过使相应的
金属试剂与()进行反应,制得含有15组(P,As,Sb和Bi)和16组(S,Se和Te)较重元素的C-未取代的3-苯并杂
庚烷(2a-g)。 Z,Z)-邻-双(β-
硫代
乙烯基)苯(5)分两步衍生自常见的
邻苯二甲醛(3)。如此获得的
异戊二烯(2)对杂原子挤出具有热稳定性,并且根据(1)H-NMR谱分析估计,它们的加热半衰期表明,3-苯并杂
庚烷(2)的稳定性远不及相应的1-苯并杂
庚烷(1)。含Sb,Bi和Te的2,4-双(三甲基甲
硅烷基)-3-苯并杂
庚烷(17)也是由邻二
碘苯(9)分6个步骤制备的,发现比相应的C-未取代的杂
庚烷更稳定(2)。