Towards a versatile synthesis of kainoids III: Efficient methods for control of C-4 stereochemistry
作者:Jack E. Baldwin、Andrew M. Fryer、Mark R. Spyvee、Roger C. Whitehead、Mark E. Wood
DOI:10.1016/s0040-4020(97)00192-0
日期:1997.4
Halo- and silenolactonisation methods were used to prepare benzylic lactones from enamide carboxylic acids. The lactones were subsequently cleaved with predominantly inversion of configuration at the benzylic centre to give protected acromelic analogues with the correct C-4 stereochemistry. Hydroxyl directed heterogeneous hydrogenation of related enamide carbinols gave total stereocontrol at C-4. (C) 1997 Elsevier Science Ltd.
Towards a versatile synthesis of kainoids II: Two methods for establishment of C-4 stereochemistry
作者:Jack E. Baldwin、Samantha J. Bamford、Andrew M. Fryer、Martin P.W. Rudolph、Mark E. Wood
DOI:10.1016/s0040-4020(97)00191-9
日期:1997.4
Benzylic lactone hydrogenolysis and enamide reduction were used to generate protected C-4 aryl substituted kainoid analogues which were deprotected to their corresponding free amino acids. X-ray crystographic data were obtained for the C-4 2-MeOPh- analogue.