Protection of the Benzoxaborole Moiety: Synthesis and Functionalization of Zwitterionic Benzoxaborole Complexes
作者:James M. Gamrat、Giulia Mancini、Sarah J. Burke、Rebecca C. Colandrea、Nicholas R. Sadowski、Bryan C. Figula、John W. Tomsho
DOI:10.1021/acs.joc.8b00677
日期:2018.6.1
incompatible reactions (oxidations, substitutions, and mild reductions) to be achieved in the presence of the benzoxaborole moiety. 3-(N,N-Dimethylamino)-1-propanol was determined to be useful in one-step sequences and is readily cleaved upon workup. Two other groups, N-methylsalicylidenimine and 2-[1-(methylimino)ethyl]phenol, are suitable for multistep syntheses. Deprotection with mild aqueous acid
[EN] PROTECTIVE GROUPS AND METHODS FOR PROTECTING BENZOXABOROLES OR OXABOROLES<br/>[FR] GROUPES PROTECTEURS ET PROCÉDÉS DE PROTECTION DE BENZOXABOROLES OU D'OXABOROLES
申请人:UNIV OF THE SCIENCES
公开号:WO2019173814A1
公开(公告)日:2019-09-12
The present invention relates in part protective groups that can be used to reversibly protect benzoxaboroles and/or oxaboroles and yield the corresponding protected complexes. The invention further relates to the use of these protective groups to protect benzoxaboroles and/or oxaboroles.
Abstract2‐(1‐Methyliminoethyl)phenol (1 a) reacts with diethyl zinc to give bis[2‐(1‐methyliminoethyl)phenolato]zinc (3) via [2‐(1‐methyliminoethyl)phenolato]ethylzinc (2) as an intermediate. The complex 3 is also formed in the reaction of bis(trimethylsilyl)amide zinc with 1 a. The compounds were characterized by microanalysis, NMR (1H, 13C) and IR spectroscopy. X‐ray structure analysis of the compounds 2 and 3 revealed that both compounds form in the solid state dimeric species where the monomeric units are bridged via two oxygen atoms forming a planar Zn2O2 ring with tetrahedral [ZnO2NC] and trigonal‐bipyramidal [ZnO3N2] coordination of the zinc atom, respectively.