New Hindered Amide Base for Aryne Insertion into Si–P, Si–S, Si–N, and C–C Bonds
作者:Milad Mesgar、Justin Nguyen-Le、Olafs Daugulis
DOI:10.1021/jacs.8b07064
日期:2018.10.24
general method for a new, hindered lithium diadamantylamide (LDAM) base-promoted insertion of arynes into Si-P, Si-S, Si-N, and C-C bonds is described. Arynes are generated from easily available aryl triflates and halides. Subsequent reaction of the aryne with silylated phosphines, sulfides, or amines affords the insertion products. Furthermore, a one-step synthesis of anthracenes from aryl halides and
描述了一种新的受阻锂二金刚胺 (LDAM) 碱促进芳炔插入 Si-P、Si-S、Si-N 和 CC 键的一般方法。芳烃是由容易获得的芳基三氟甲磺酸酯和卤化物生成的。芳炔与甲硅烷基化膦、硫化物或胺的后续反应提供插入产物。此外,还证明了从芳基卤化物和芳基酮一步合成蒽。氰基、芳基、烷基、三氟甲基、乙烯基、甲氧基、氯、氟甚至甲酰基部分与反应条件相容。与四甲基哌啶锂 (LiTMP) 促进的反应相比,新的氨基化锂提供了更高的产率。此外,LDAM 碱的庞大性基本上抑制了芳炔与碱的反应,允许使用芳基卤化物和三氟甲磺酸酯作为限制试剂。
Silicon in benzamide directed ortho metalation. Formation and reactions of benzamide benzynes
作者:K. Shankaran、V. Snieckus
DOI:10.1016/s0040-4039(01)81301-0
日期:1984.1
2-Trimethylsilyl-3-triflyl benzamide 3, undergoes fluoride-mediated 1,2-elimination to give the benzyne intermediate 4 which is trapped by cycloaddition (5), and nucleophilic reactions (6).
Development of a New Class of Chiral Phosphorus Ligands: P-Chirogenic Diaminophosphine Oxides. A Unique Source of Enantioselection in Pd-Catalyzed Asymmetric Construction of Quaternary Carbons
phosphorus compounds have been successfully applied to Pd-catalyzed asymmetric construction of tertiary and quaternary carbons. The actual ligand structure was the trivalent phosphorus species 17, which was generated in situ by BSA-induced P(V) to P(III) transformation of 6, the preligand. Detailed mechanistic studies, including asymmetric amplification and initial rate kinetics, revealed that complex 18
easily prepared by this method, in the presence of various arynophiles efficiently afforded diverse aniline derivatives, including a 5-aminocoumarin derivative, demonstrating the utility of aryne relay approach.
[EN] DISUBSTITUTED-AMINODIFLUOROSULFINIUM SALTS, PROCESS FOR PREPARING SAME AND METHOD OF USE AS DEOXOFLUORINATION REAGENTS<br/>[FR] SELS DE (AMINO DISUBSTITUÉ)DIFLUOROSULFINIUM, LEURS PROCÉDÉS DE PRÉPARATION ET D'UTILISATION EN TANT QUE RÉACTIFS DE DÉSOXOFLUORATION
申请人:OMEGACHEM INC
公开号:WO2010145037A1
公开(公告)日:2010-12-23
The invention relates to disubstituted-aminodifluorosulfinium salts represented by the formula (I). Processes for preparing same and methods of use as deoxofluorinating reagent is also provided.