The stereochemistry of the intramolecular electrophilic attack of an aldehyde on a carbon-tin bond
作者:Ian Fleming、Michael Rowley
DOI:10.1016/s0040-4020(01)87383-x
日期:1986.1
The cyclopentane-forming reaction (20–43) of (4),5)-2, 2,4-trimethyl-5-trimethylstannylhexanal takes place with retention of configuration at the carbon atom undergoing electrophilic substitution, in contrast to similar cyclopropane-forming reactions (e.g. 47–48), which take place with inversion of configuration. The hydride transfer (24–45) of the 4,5 diastereoisomeric hexanal takes place from a conformation
(4 ),5 )-2,2,4-三甲基-5-三甲基锡烷基己醛的环戊烷形成反应(20–43)与亲电取代的碳原子形成相反,发生了亲电取代的碳原子上保留了构型反应(例如47–48),这是随着配置反转而发生的。4,5非对映异构己醛的氢化物转移(24-45)是从氢化物构象到苯乙烯基的。对于可能形成四元环的反应,会发生断裂(16–28和17–30)。带有苯乙烯基的碳上存在苯环会干扰旨在测试S E 2反应的立体化学的反应,从而使该反应转向形成四氢化萘(10-26和34-38)或苯环庚烯(34 –37)。