Diels–Alder reactivity of 4-aryl-1-phthalimido-2-siloxy-1,3-butadienes
摘要:
The reaction of (1Z,3E) and (1E,3E) 4-aryl-1-phthalimido-2-trialkylsiloxy-1,3-butadienes with maleimides and quinones has been studied. The observed exo-stereospecifity can be attributed to the simultaneous presence of the phthalimido and aryl groups, which produce strong hindrance during the endo approach. (c) 2005 Elsevier Ltd. All rights reserved.