Cathodic cleavage of heteroarylalkylsulfones : A facile route to long chain aliphatic sulfinates and relevant sulfones.
摘要:
Heteroarylalkylsulfones -mainly pyridylalkylsulfones- exhibit a cathodic cleavage reaction producing alkanesulfinate anion in high yield. This reaction is tested with long chain alkyl groups and allows an easy synthesis of aliphatic sulfinic acids.
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。
Catalyst-Free Sulfonylation of (Hetero)aryl Iodides with Sodium Dithionite
作者:Yuewen Li、Tong Liu、Guanyinsheng Qiu、Jie Wu
DOI:10.1002/adsc.201801445
日期:2019.3.5
The commercially available and cheap sodium dithionite is used as the source of sulfonyl group for the synthesis of sulfones and sulfonamides from (hetero)aryl iodides under catalyst‐free conditions. During the reaction process, sodiumsulfinates generated in situ are the key intermediate, which can be further converted into diverse sulfones and sulfonamides. This transformation proceeds through a
Novel Compounds and Compositions as Cathepsin Inhibitors
申请人:Graupe Michael
公开号:US20070135386A1
公开(公告)日:2007-06-14
The present invention relates to novel cathepsin S inhibitors, the pharmaceutically acceptable salts and N-oxides thereof, their uses as therapeutic agents and the methods of their making.