Novel [2 + 2] Cycloaddition Reactions of (Dimethylamino)bis(trifluoromethyl)borane, (CF<sub>3</sub>)<sub>2</sub>BNMe<sub>2</sub>, with <i>N</i>-Sulfinylsulfonamides, Aminoiminophosphines, Carbodiimides, and a Keteneimine
作者:David J. Brauer、Silke Buchheim-Spiegel、Hans Bürger、Ralf Gielen、Gottfried Pawelke、Jürgen Rothe
DOI:10.1021/om970262i
日期:1997.11.1
(Dimethylamino)bis(trifluoromethyl)borane, (CF3)2BNMe2 (1), combines with N-sulfinylsulfonamides RO2SNSO in a [2 + 2] fashion (R = Me (2a), Et (2b), iPr (2c), Ph (2d), and pTol (2e)). Aminoiminophosphines RNPNR2‘ react with 1 analogously to yield the = SiMe3, NR2‘ = N(SiMe3)2 (3a), TMP (3b); R = tBu, NR2‘ = N(SiMe3)tBu (3c), NiPr2 (3d), TMP (3e)). Carbodiimides RNCNR add to the BN bond of 1 to give
(二甲氨基)双(三氟甲基)硼烷(CF 3)2 BNMe 2(1)与N-亚磺酰基磺酰胺R O 2 S N S O以[2 + 2]方式结合(R = Me(2a),Et(2b),i Pr(2c),Ph(2d)和p Tol(2e))。氨基亚氨基膦RN P NR 2 '与1类似地反应生成= SiMe 3,NR 2 '= N(SiMe 3)2(3a),TMP(3b); R =t Bu,NR 2 '= N(SiMe 3)t Bu(3c),N i Pr 2(3d),TMP(3e))。碳二亚胺- [R Ñ Ç Ñ R添加到在乙的N键1,得到不稳定的,其重排在20℃下,得到的四元杂环=我PR(图5a),C ^ C ^ 6 ħ 11(5b)的)。对于具有芳基取代基R = p XC 6 H 4的碳二亚胺,这种重排与内部亲电芳族取代反应以及两者的混合物竞争(X = H(5c),Me(5d),OMe(5e))(X =