Metalated Nitriles: Organolithium, -magnesium, and -copper Exchange of α-Halonitriles
作者:Fraser F. Fleming、Zhiyu Zhang、Wang Liu、Paul Knochel
DOI:10.1021/jo047877r
日期:2005.3.1
dimethylcuprate reagents generating reactive, metalated nitriles. The rapid halogen−metal exchange with alkyllithium and Grignard reagents allows selective exchange in the presence of reactive carbonyl electrophiles, including aldehydes, providing a high-yielding alkylation protocol. Lithiated and magnesiated nitriles react with propargyl bromide by SN2 displacement whereas organocopper nitriles react
α-卤代腈与烷基锂,有机镁和二甲基cup酸锂试剂反应生成活性的金属化腈。与烷基锂和格氏试剂的快速卤素金属交换可在存在醛的反应性羰基亲电试剂存在下进行选择性交换,从而提供了高产率的烷基化方案。锂化和氧化镁腈通过S N 2置换与炔丙基溴反应,而有机铜腈通过S N 2'置换反应,与C-金属化腈的形成相关。
Metalated Nitriles: Halogen−Metal Exchange with α-Halonitriles
作者:Fraser F. Fleming、Zhiyu Zhang、Paul Knochel
DOI:10.1021/ol036202s
日期:2004.2.1
[reaction: see text] Alpha-halonitriles react with organometallic reagents in a facile halogen-metal exchange. The halogen-metal exchange is extremely fast with Grignard and alkyllithium reagents, generating metalated nitriles in situ with aldehyde, ketone, acid chloride, and acylcyanide electrophiles. Sequential halogen-metal exchange and methylation of conformationally constrained nitriles is highly
[EN] PYRAZOLE AMIDE DERIVATIVE<br/>[FR] DÉRIVÉ DE PYRAZOLE AMIDE
申请人:TEIJIN PHARMA LTD
公开号:WO2015129926A1
公开(公告)日:2015-09-03
The present invention relates to a novel compound having a function of inhibiting RORγ activity. The present invention also relates to pharmaceutical composition comprising the compound, a use of the compound in treating or preventing autoimmune diseases, inflammatory diseases, metabolic diseases, or cancer diseases.
Sulfone–Metal Exchange and Alkylation of Sulfonylnitriles
作者:Xun Yang、Dinesh Nath、Michael R. Gau、Omar W. Steward、Fraser F. Fleming
DOI:10.1002/anie.201704028
日期:2017.6.12
sulfone–metal exchange is described. Treating substituted 2‐pyridylsulfonylacetonitriles with either BuLi or Bu3MgLi generates metalated nitriles that efficiently intercept a variety of electrophiles to afford quaternary nitriles. The 2‐pyridylsulfone is critical for the sulfone–metal exchange because chelation anchors the organometallic proximal to the electrophilic, tetrasubstituted sulfone to override
描述了第一次一般的砜-金属交换。用BuLi或Bu 3 MgLi处理取代的2-吡啶基磺酰基乙腈会生成金属化的腈,该腈可有效拦截各种亲电试剂,从而生成季腈。2-吡啶基砜对于砜与金属的交换至关重要,因为螯合将有机金属锚定在亲电子的四取代砜的近端,以克服复合物引起的去质子化。用温和的碱(K 2 CO 3或DBU)烷基化2-吡啶磺酰基乙腈,然后进行砜-金属交换和烷基化,通过三个烷基化作用快速组装季腈,其中只有一个需要有机金属试剂。
Chemoselective Alkylations with <i>N</i>- and <i>C</i>-Metalated Nitriles
作者:Xun Yang、Dinesh Nath、Fraser F. Fleming
DOI:10.1021/acs.orglett.5b02481
日期:2015.10.2
electrophilic alkylations. N-Lithiated or C-magnesiated nitriles can be prepared from the same nitrile precursor and selectively reacted with a 1:1 mixture of methyl cyanoformate and benzyl bromide or bifunctionalelectrophiles through chemoselective attack onto either an alkyl halide or a carbonyl electrophile. A mechanistic explanation for the chemoselectivity preferences is provided that rests on the structural