作者:Peter Paetzold、Ulli Englert、Rudolf Finger、Thomas Schmitz、Alexander Tapper、Ralf Ziembinski
DOI:10.1002/zaac.200300396
日期:2004.4
dicarbadicobaltatetrahedrane [(CA)2Co(CO)3}2] starting from MeB=CA2 and [Co2(CO)8]}. The (2+3) cyclodaddition of MeB=CA2 to the azide X2PN3 (X = NiPr2) as 1, 3-dipole gives the five-membered ring [=BMe—CA2—N=N—NX=] (5a) and to RN3 the rings [=BMe—CA=N—NA—NR=] (5′b, c; R = iBu, A; formed from the cycloadducts 5b, c by migration of A); analogously, [=BMe—CA′=N—NA—NA=] (5′d) is formed from MeB=CAA′ and
将路易斯碱 L 添加到甲基(亚甲基)硼烷 MeB=CA2(A = SiMe3) 和 MeB=CAA' (A' = SiMe2Cl) 中得到加合物 MeB(L)=CA2 (1a, b; L = 三甲基吡啶, PMe3) 和 MeB(L)=CAA'(1c,d;L = 二甲基吡啶和三甲基吡啶)。将醇和胺 HX 添加到 BC 双键,得到硼烷 MeB(X)-CHA2 (8a-c;X = OiPr、OtBu、NiPr2);MeB=CAA' 和 HNMe2 以 1:2 的比例反应,生成 MeB(X)-CHA(SiMe2X)(2d;X = NMe2)。从 MeB=CA2 和 BH3,五元环 [-CA2-BH-CA2-BMe(Hm)2BMe-] (2e; 2:1) 或六元环 [-CA2-BH(Hμ)2BMe- CA2-BH(Hμ)2BMe-] (2f; 1:1) 形成,均含有双氢桥;产物 2f 在空间群 P1¯