Easy access to substituted selenazine and selenopyran derivatives by a cycloaddition-cyclorersion process
作者:Didier Dubreuil、Jean Paul Pradère、Nathalie Giraudeau、Martin Goli、François Tonnard
DOI:10.1016/0040-4039(94)02229-5
日期:1995.1
condensation of selenobenzamide with orthoamides. [4+2] cycloadditions with electrophilic dienophiles were performed leading to 1,3-selenazine derivatives. Selenoamide vinylogs obtained by thermolysis of 4H-1,3-selenazines, were the precursors of functionalised selenopyrans or selenophenes.
通过硒代硒酰胺与原酰胺的缩合分离出N'-硒酰基acy啶。[4 + 2]与亲电子的亲二烯物的环加成反应产生了1,3-硒硒嗪衍生物。通过热解4 H -1,3-selenazines获得的硒代酰胺乙烯基醇是功能化硒代吡喃或硒代苯的前体。