Formation of borata-alkene/iminium zwitterions by ynamine hydroboration
作者:Long Wang、Zhongbao Jian、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1039/c8dt02435a
日期:——
The ynamine TMP–CC–CH3 adds HB(C6F5)2 to give the unsaturated C2-bridged N/B FLP 5. Compound 5 shows the structural data indicating a marked participation of the zwitterionic mesomeric borata-alkene/iminium form. It splits dihydrogen at r.t. with Z- to E-isomerization at the central CC double bond. Hydroboration of the ynamine Me3Si–CC–NiPr2 with HB(C6F5)2 yields a N/B FLP that shows a strongly distorted
乙胺基TMP–CC C–CH 3加入HB(C 6 F 5)2,得到不饱和C 2桥联的N / B FLP 5。化合物5显示的结构数据表明两性离子介孔的硼酸-烯烃/亚胺鎓形式的显着参与。它分裂二氢在室温与ž到- Ë在中央Ç-isomerization C双键。用HB(C 6 F 5)2对乙炔胺Me 3 Si–C C–N i Pr 2进行硼氢化生成N / B FLP,显示中央C严重扭曲C双键,其取代基对的平面在其末端旋转约。57°。
Design of 7-substituted 3-azabicyclo[3.3.1]non-6-enes based on allylboron-acetylene condensation
作者:M. V. Iurenkov、T. V. Potapova、S. V. Baranin、Yu. N. Bubnov
DOI:10.1007/s11172-021-3306-0
日期:2021.10
An efficient synthesis of 7-substituted 3-azabicyclo[3.3.1]non-6-enes from available 3-borabicyclo[3.3.1]non-6-enes, the products of allylboron-acetylene condensation, was developed. The terminal alkynes with nitrogen-containing substituents were involved for the first time into the reaction with triallylborane.