6-exo versus 7-endo iodolactonizations of 2-(alkynyl)phenylacetic acids
摘要:
Exposure of 2-alkynylphenylacetic acids to excess iodine in acetonitrile containing anhydrous potassium carbonate delivers good yields, either of the corresponding isochroman-3-ones or benzo[d]oxepin-2(1H)-ones, depending upon the alkyne substituent: when this is alkyl, the former 6-exo products dominate, Otherwise the 7-endo products are formed largely or, more often, exclusively. (C) 2009 Elsevier Ltd. All rights reserved.
Hellmann,H. et al., Justus Liebigs Annalen der Chemie, 1962, vol. 659, p. 49 - 63
作者:Hellmann,H. et al.
DOI:——
日期:——
6-exo versus 7-endo iodolactonizations of 2-(alkynyl)phenylacetic acids
作者:Mohamed Gomaa Ali Badry、Benson Kariuki、David W. Knight、Mohammed F.K.
DOI:10.1016/j.tetlet.2008.12.097
日期:2009.4
Exposure of 2-alkynylphenylacetic acids to excess iodine in acetonitrile containing anhydrous potassium carbonate delivers good yields, either of the corresponding isochroman-3-ones or benzo[d]oxepin-2(1H)-ones, depending upon the alkyne substituent: when this is alkyl, the former 6-exo products dominate, Otherwise the 7-endo products are formed largely or, more often, exclusively. (C) 2009 Elsevier Ltd. All rights reserved.