Retardation of AlH<sub>2</sub>Cl Hydrogenolysis of the Ethylene Ketals of 5-Norbornen-2-one and 2-Norbornen-7-one Due to the Presence of the Double Bond
作者:H. A. Davis、R. K. Brown
DOI:10.1139/v73-052
日期:1973.2.1
bond in either 5-norbornen-2-one ethylene ketal or 2-norbornen-7-one ethylene ketal provides no anchimeric assistance in the hydrogenolysis of these ketals by AlH2Cl in ether. Instead, a marked retardation of reaction occurs, a result considered to be due to competitive association of the Lewis acid, AlH2Cl, with the π bond.Attack of the AlH2Cl on the former ketal occurs from the exo direction to give