[2 + 2 Cycloaddition reactions of dialkylaminobis(trifluoromethyl)boranes with isocyanates and isothiocyanates. Crystal structures of (CF32tBu, (CF32tBu, (CF32 and (CF3)2Me
作者:A. Ansorge、D.J. Brauer、H. Bürger、F. Dörrenbach、T. Hagen、G. Pawelke、W. Weuter
DOI:10.1016/0022-328x(91)86307-c
日期:1991.4
(IX) respectively. I, V, VI, VIII and IX rearrange at ≈60°C to form the isomers (CF3)2 (XI) and (CF3)2; R = Me (XII), Et (XIII), Ph (XIV) and p-FC6H4 (XV), respectively. At room temperature D2 reacts with MeNCO to yield (CF3)2 (X) directly. X and XI reversibly incorporate MeNCO to form the six-membered heterocycles (CF3)2Me; R = Me (XVI) and Et (XVII). The structures of II, VII, XIV and XVII have been
研究了(CF 3)2 BNME 2(D1)和(CF 3)2 BNEt 2(D2)与异氰酸酯和异硫氰酸酯的反应。在室温或室温附近,RNCO和RNCS的CN键与D1的BN键进入[2 + 2]环加成反应,生成四元环(CF 3)2 R; R = Me(I),t Bu(II),Ph(III),CF 3(IV)和(CF 3)2 R; R = Me(V),Et(VI),t Bu(VII),Ph(VIII)和p -FC 6 H4(IX)。I,V,VI,VIII和IX在约60°C下重排以形成异构体(CF 3)2(XI)和(CF 3)2;R分别为Me(XII),Et(XIII),Ph(XIV)和p -FC 6 H 4(XV)。在室温下,D2与MeN = C = O反应,直接生成(CF 3)2(X)。X和XI可逆地结合MeNC= O形成六元杂环(CF 3)2我; R =我(XVI)和Et(XVII