Reactivity of cis-fused 3-(dialkylamino)cyclobutenes in polar and apolar solvents. Synthesis, x-ray structures, and reactions of cis,cis- and cis,trans-1,3-cycloalkadienes
作者:David N. Reinhoudt、Willem Verboom、Germ W. Visser、Willem P. Trompenaars、Sybolt Harkema、Gerrit J. Van Hummel
DOI:10.1021/ja00317a029
日期:1984.3
Conrotatory ring opening of cis-fused 3-aminocyclobutenes. X-ray analysis of a cis,trans-2H-thiocin
作者:G. W. Visser、W. Verboom、D. N. Reinhoudt、S. Harkema、G. J. Van Hummel
DOI:10.1021/ja00388a090
日期:1982.12
readily available by Williamson synthesis from the hydroxy olefin precursors indicated. It is noteworthy that the stereochemistry of the substituent R' in 3i and 3j is exclusively exo.I6 This synthetically valuable stereoselectivity is in sharp contrast with a topologically different previous synthesis of 3i by intermolecular photocycloaddition of ethylene with 4, which affords an equal yield of the endo-epimer