Schoepf; Thierfelder, Justus Liebigs Annalen der Chemie, 1932, vol. 497, p. 22,33
作者:Schoepf、Thierfelder
DOI:——
日期:——
(-)-Cryptaustoline: its synthesis, revision of absolute stereochemistry, and mechanism of inversion of stereochemistry
作者:A. I. Meyers、Thais M. Sielecki、Debbie C. Crans、Robert W. Marshman、Thanh H. Nguyen
DOI:10.1021/ja00048a020
日期:1992.10
The asymmetric synthesis of (S)-(+)-cryptaustoline was accomplished and found to differ in sign of rotation with the natural «S»-(-)-material. The previously assigned absolute configuration was found to be incorrect and is now corrected. The reversal in stereochemistry came about through an unusual manner involving (S)-(+)-laudanosoline (3) cyclizing to (R)-(-)-cryptaustoline ((-)-1c). The mechanism