The reaction of selenoaldehydes with 2-methoxyfuran using their generation by retro Diels–Alder reaction
作者:Aojia Zhou、Masahito Segi、Tadashi Nakajima
DOI:10.1016/s0040-4039(02)02830-7
日期:2003.2
Selenoaldehydes, regenerated by thermal retro Diels–Alder reaction of anthracene cycloadducts under neutral conditions, reacted with 2-methoxyfuran to give methyl penta-2,4-dienoates along with the deposition of elemental selenium. In a similar reaction with 2-methoxyfuran using thioaldehyde, thiirane compound was isolated. This suggests the formation of selenirane intermediates in the above reaction
Stereoselective hetero Diels-Alder reaction of selenoaldehydes, generated by thermal retro Diels-Alder reaction of anthracene cycloadducts, with pentavalent 3,4-dimethylphosphole chalcogenides at 110 degrees C in toluene to give the corresponding [4+2] cycloadducts as a single diastereoisomer in good yields, accompanied by a slight scrambling of chalcogen atoms. Higher reaction temperature led to an increase of the scrambling between chalcogen atoms. (c) 2007 Elsevier Ltd. All rights reserved.
ERKER, GERHARD;HOCK, REGINA;NOLTE, RAINER, J. AMER. CHEM. SOC., 110,(1988) N 2, 624-625