Enantioselective ring construction through asymmetric olefin-ketene cycloaddition. A highly enantiocontrolled approach to (-)-.alpha.-cuparenone and (+)-.beta.-cuparenone
Remote Allylation of Unactivated C(sp<sup>3</sup>)–H Bonds Triggered by Photogenerated Amidyl Radicals
作者:Bin Xu、Uttam K. Tambar
DOI:10.1021/acscatal.9b00563
日期:2019.5.3
The allylationreaction is a highly versatile transformation in chemical synthesis. While many elegant direct C(sp2)–H allylationreactions have been developed, the direct allylation of unactivated C(sp3)–H bonds is underdeveloped. By applying photoredox catalysis and a [1,5]-HAT process, herein we report a direct allylation of unactivated C(sp3)–H bonds. This photocatalyzed transformation is tolerant
A nickel-catalyzed reductive cross-coupling of aziridines and allylicchlorides was realized by using manganese metal as the reducing agent. This protocol afforded a convenient approach to obtain β-allyl-substituted arylethylamines bearing various functional groups. The utility of this reaction was also demonstrated by scale-up preparation and diverse transformations, including the synthesis of Baclofen
enables dual concurrent activation of poorly reactive perfluoroalkoxide and alkylhalides, especially alkyl chlorides, leading to the formation of diverse perfluoroalkoxylated organic compounds. Installation of perfluoroalkoxy groups by this methodology is cost-effective, circumventing the need for over-stoichiometric cesium or silver salts. This methodology also provides high functional group compatibility
N-[2-(pyridyl)propyl]-N-substituted sulfonamide, herbicide containing the same as an active ingredient and intermediate thereof
申请人:MITSUBISHI KASEI CORPORATION
公开号:EP0281110A2
公开(公告)日:1988-09-07
Disclosed herein is an N-[2-(pyridyl)propyl]-N-substituted sulfonamide represented by the following general ormula (I):
wherein J represents a phenyl group which may be substituted or benzo-condensed, A represents -CH2-, -CH=CH-, -0-or -N(r)-(wherein r represents an alkyl group having 1 to 4 carbon atoms), b represents 0 or 1, R represents an alkyl group, alkenyl group, alkynyl group, alkoxy group, fluoroalkyl group or formyl group, D represents a hydroxyl group, E represents a halogen atom, an alkylsulfonyloxy group or a benzenesulfonyloxy group which may be substituted, or D and E represent -0-in combination, and V represents a pyridyl group which may be substituted, a herbicide containing said N-[2-(pyridyl)propyl]-N-substituted sulfonamide as an active ingredient and a 1-(halogenomethyl)vinylpyridine as an intermediate thereof.
本发明公开了一种 N-[2-(吡啶基)丙基]-N-取代的磺酰胺,由以下通式(I)代表:
其中 J 代表可被取代或苯并缩合的苯基,A 代表-CH2-、-CH=CH-、-0-或-N(r)-(其中 r 代表具有 1 至 4 个碳原子的烷基),b 代表 0 或 1,R 代表烷基、烯基、炔基、烷氧基、氟烷基或甲酰基,D 代表羟基、E 代表卤素原子、烷基磺酰氧基或可被取代的苯磺酰氧基,或 D 和 E 结合代表-0,V 代表可被取代的吡啶基,除草剂含有所述 N-[2-(吡啶基)丙基]-N-取代的磺酰胺作为活性成分和 1-(卤代甲基)乙烯基吡啶作为中间体。
Bodrikov,I.V. et al., Journal of Organic Chemistry USSR (English Translation), 1976, vol. 12, p. 1825 - 1831