Stereochemical studies. Part XLVI. The 2-alkylcyclohexyl tosylate solvolysis problem: the solvolysis of the 2-methyl-4-t-butylcyclohexyl tosylates
作者:M. Pánková、J. Sicher、M. Tichý、M. C. Whiting
DOI:10.1039/j29680000365
日期:——
suggested to explain the solvolytic behaviour of the 2-alkylcyclohexyl tosylates are briefly reviewed. A study is reported of the acetolysis and ethanolysis of the four stereoisomeric 2-methyl-4-t-butylcyclohexyl tosylates. A comparison with analogous data for the cis- and trans-4-t-butylcyclohexyl tosylates clarifies the effects of a vicinal methyl group, in all four positions relative to the tosyloxy-group
A systematic study of the diastereoselectivity of the radical carboazidation of methylenecyclohexane derivatives is presented. Several substitution patterns leading to a high level of stereocontrol have been identified. Axial attack is the preferred reaction pathway for cyclohexyl radicals, and excellent stereoselectivities can be obtained by introducing an axial substitutent at position 2. In this