Stereoselective dihydroxylation of 2-alkyl- and 2,4-dialkyl-2-amido-3-cyclohexen-1-ones. Synthesis of enantiomerically related 2-alkyl- and 2,4-dialkyl-3-hydroxy-1- oxocyclohexan-2,4-carbolactones by complementary buturolactonization reactions
摘要:
Stereoselective dihydroxylation of 2a-2f gives <(cis)under bar>-diols 3a-3f, from which hydroxylactones 5a-5f are obtained by an acid-catalyzed process involving retro aldol-realdolization prior to transesterification. (C) 1998 Elsevier Science Ltd. All rights reserved.
TEMPO free radical derived β-aminoalkoxyketolactones: substrates for base-, acid- and radical-induced fragmentation reactions
作者:Arthur G. Schultz、Xuqing Zhang
DOI:10.1039/a909750c
日期:——
β-Aminoalkoxyketolactones 2 and 3 obtained from the TEMPO
free radical substitution of iodolactones 1 undergo fragmentations under
basic, acidic and free radical conditions.