Reduction of (CAAC)BBr2(NCS) (CAAC=cyclicalkyl(amino)carbene) in the presence of a Lewis base L yields tricoordinate (CAAC)LB(NCS) borylenes which undergo reversible E/Z‐isomerization. The same reduction in the absence of L yields deep blue, bis(CAAC)‐stabilized, boron‐doped, aromatic thiazolothiazoles resulting from the dimerization of dicoordinate (CAAC)B(NCS) borylene intermediates.
(CAAC)BBr 2 (NCS) (CAAC=环烷基(氨基)卡宾)在路易斯碱L存在下还原生成三配位(CAAC)LB(NCS)亚硼撑,其发生可逆的E/Z异构化。在不存在 L 的情况下进行同样的还原反应,会产生深蓝色、双 (CAAC) 稳定、硼掺杂的芳香族噻唑并噻唑,这是由双配位 (CAAC)B(NCS) 亚硼基中间体的二聚化产生的。