the first broad application of alkynyl sulfides as dienophiles in cobalt(i)-catalyzed diels—alder...
Post on 06-Jun-2016
213 Views
Preview:
TRANSCRIPT
2004 Thioethers
ThioethersQ 0580 The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Cat-
alyzed Diels—Alder Reactions. — CoBr2(dppe)/ZnI2/Zn is found to be an efficient catalyst for the Diels—Alder reaction of aryl alkynyl sulfides with acyclic 1,3-dienes. With alkynyl sulfoxides and sulfones the cycloadducts are obtained in low yields. The regioselectivity of the cycloaddition is controlled by steric effects. — (HILT*, G.; LUEERS, S.; HARMS, K.; J. Org. Chem. 69 (2004) 3, 624-630; Fachbereich Chem., Philipps-Univ., D-35043 Marburg, Germany; Eng.) — Jannicke
25- 100
top related