DIFLUOROMETHYL AND DIFLUOROMETHYLENE TRANSFER REAGENTS
申请人:REGENTS OF THE UNIVERSITY OF MICHIGAN
公开号:US20200002362A1
公开(公告)日:2020-01-02
Disclosed herein are borazine, borate, and azaborinine compounds and compositions, methods of making said compounds and compositions, and methods of forming aromatic difluorocarbon compounds and difluorocarbon compounds.
BN-naphthalene (2) and BN-tetralin (7) have been prepared by a short synthesis from allyltributylstannane (3). The reaction of 3 with BCl3 followed by diallylamine and Et3N afforded (diallylamino)diallylborane (5), which gave 1,4,5,8-tetrahydro[1,2]azaborino[1,2-a][1,2]azaborine (6), on treatment with Grubbs (I) catalyst. The reaction of 6 with Pd gave 2 and 7. The reaction of 7 with Cr(CO)(6) gave the corresponding Cr(CO)(3) adduct 8, for which a crystal structure has been obtained. The isomerization of 6 to 7 has been examined using DFT calculations.
From propenolysis to enyne metathesis: tools for expedited assembly of 4<i>a</i>,8<i>a</i>-azaboranaphthalene and extended polycycles with embedded BN
作者:Federica Rulli、Guillem Sanz-Liarte、Pol Roca、Nina Martínez、Víctor Medina、Raimon Puig de la Bellacasa、Alexandr Shafir、Ana B. Cuenca
DOI:10.1039/d3sc06676b
日期:2024.4.17
A new integrated approach to BN-polycycles is rooted in a clean condensation of amines with B(allyl)3. The end game includes a gram-scale synthesis of BN-naphthalene through efficient aromatization, or assembly of BN-polycycles via enyne metathesis.