[2 + 3] Cycloaddition reactions of dimethylamino-bis(trifluoromethyl)borane, (CF3)2BNMe2, with nitrile oxides, nitrones and Me2CSO2. Crystal and molecular structure of (CF3)2 and (CF3)2
作者:David J. Brauer、Hans Bürger、Gottfried Pawelke、Jürgen Rothe
DOI:10.1016/0022-328x(96)06211-0
日期:1996.9
Dimethylamino-bis(trifluoromethyl)borane, (CF3)2BNMe2 (A), undergoes [2 + 3] cycloaddition reactions with various 1,3 dipolar species to yield five-membrane heterocycles. While nitrile oxides RCNO give (CF3)2; R = Mes (I), Ph (II) pCIC6H4 (III), tBu (IV), iPr (V), nitrones R1HCN(R2)O furnish the thermally less stable and moisture sensitive heterocycles (CF3)2 R2 = Me, R1 = Ph (VI), pCIC6H4 (VIII, tBu
二甲基氨基双(三氟甲基)硼烷(CF 3)2 BNMe 2(A)与各种1,3偶极物种进行[2 + 3]环加成反应,生成五膜杂环。而腈氧化物RCNO给出(CF 3)2 ; R = MES(I)中,Ph(II)p CIC 6 ħ 4(III),吨卜(IV),我镨(V),硝酮- [R 1 HCN(R 2)O提供热稳定性较差和湿敏杂环(CF 3)2 R 2 = Me,R 1 = Ph(VI),pCIC 6 H 4(VIII,t Bu(IX),i Pr(X); R 2 = R 1 = Ph(XI)类似地,Me 2 C ,SO 2产生五膜环(CF 3)2(XII))。从多核NMR,IR和质谱推导了新型硼化合物的组成,并通过单晶X射线衍射研究了IV和XII的结构。