REAGENT FOR ORGANIC SYNTHESIS REACTION CONTAINING ORGANIC TRIOL BORATE SALT
申请人:Miyaura Norio
公开号:US20100087646A1
公开(公告)日:2010-04-08
[Problem] To provide an organoboron compound-containing reagent for organic synthesis reactions which undergoes no trimerization with dehydration, does not necessitate activation with a base, and is stable and highly active.
[Means for Solving Problems] The reagent for organic synthesis reactions contains an organic triol borate salt represented by any of the general formulae (I) to (III) and general formula (XVI): (wherein R
1
represents alkyl, alkenyl, etc.; R
2
represents optionally substituted alkyl, alkenyl, alkynyl, etc. or represents hydrogen; m
+
represents an alkaline metal ion, phosphonium ion, or given ammonium ion; M
2+
represents an alkaline earth metal; X represents halogen or alkoxide; Y represents an alkali metal ion, etc.; A represents optionally substituted methylene; and n represents an integer).
Lewis Acid Catalyzed Allylboration: Discovery, Optimization, and Application to the Formation of Stereogenic Quaternary Carbon Centers
作者:Jason W. J. Kennedy、Dennis G. Hall
DOI:10.1021/jo049773m
日期:2004.6.1
A full account of the development of the first catalytic manifold for the additions of allylboronates to aldehydes is described. The thermal additions (both diastereospecific and enantioselective) of 2-carboxyester 3,3-disubstituted allylboronates 1 to both aromatic and aliphatic aldehydes give biologically and synthetically important exo-methylene butyrolactones 2 containing a β-quaternary carbon
Synthesis of Cyclopropane Fatty Acids by C(<i>sp</i><sup>3</sup>)−C(<i>sp</i><sup>3</sup>) Cross-Coupling Reaction and Formal Synthesis of α-Mycolic Acid
manipulations that are often employed in conventional synthetic routes. This method could be applicable to the synthesis of trans‐cyclopropane fatty acids and enantioenriched cyclopropane fatty acids. Formal synthesis of α‐mycolic acid was achieved by the C(sp3)−C(sp3) cross‐coupling reaction of cyclopropane‐containing bifunctional building blocks.
Generation of metalloenamines by carbon–carbon bond formation: ring opening reactions of 2-methyleneaziridines with organometallic reagents
作者:Jerome F. Hayes、Michael Shipman、Heather Twin
DOI:10.1039/b005623p
日期:——
Ringopening of 2-methyleneaziridines with Grignard reagents in the presence of CuI yields metalloenamines in a regiospecific fashion which can be further reacted with electrophiles to produce functionalised ketones via a one-pot process.
在 CuI 存在下用格氏试剂开环 2-亚甲基氮丙啶以区域特异性方式产生金属烯胺,该金属烯胺可以进一步与亲电试剂反应,通过一锅法生产官能化酮。
Multicomponent Reactions Involving 2-Methyleneaziridines: Rapid Synthesis of 1,3-Disubstituted Propanones
作者:Jerome F. Hayes、Michael Shipman、Heather Twin
DOI:10.1021/jo016164v
日期:2002.2.1
metalloenamine (metalated imine) intermediate in a regiocontrolled manner. The sequential formation of two new intermolecular carbon-carbon bonds in this reaction provides a rapid entry into a variety of 1,3-disubstituted propan-2-ones, including 11 and 14-23. The scope and mechanism of this multicomponent reaction (MCR) has been assessed. It is established that this MCR tolerates alkyl, aryl, and benzylic Grignard