Sulphenamides as synthetic precursors of aminyl radicals
摘要:
Sulphenamides, readily synthesised from reaction between benzenesulphenyl derivatives and amines, undergo facile reaction with radical generating reagents such as tributyltin hydride to yield aminyl radicals.
我们研究了硅钨酸 (H 4 SiW 12 O 40 ) 多金属氧酸盐 (POM) 对糠醛和胺之间反应的催化效果,该反应选择性地产生反式- N , N -4,5-取代二氨基环戊烯-2-酮 ( trans - DACP)。H 4 SiW 12 O 40促进反式-DACP 库的合成,其负载量低至0.05 mol%,在露天,无添加剂,在短时间内和良好的高分离产率。该方案适用于仲胺以及具有 p K b的芳族伯胺高于约 9. 目前的催化合成方案具有扩展的底物范围和高产率,据我们所知,它代表了第一个多金属氧酸盐驱动的范例,作为在温和反应条件下生产环戊酮框架的有效方法。
Generation of aminyl radicals using sulfenamides as synthetic precursors
作者:W.Russell Bowman、David N. Clark、Robert J. Marmon
DOI:10.1016/s0040-4020(01)80837-1
日期:1994.1
Sulfenamides are synthesised from reaction between amines and N-(benzenesulfenyl)-phthalimide or benzenesulfenyl chloride. The sulfenamides undergo reaction with tributyltin hydride to yield aminylradicals which can be cyclised onto suitable alkenes.
N-Benzyl-N-cycloalkyl-ureas of the formula ##STR1## in which R.sup.1 represents cycloalkyl with 5-8 carbon atoms in the ring, which may be optionally substituted by alkyl with 1-8 carbon atoms, R.sup.2 represents alkyl with 1-8 carbon atoms, cycloalkyl with 5-8 carbon atoms in the ring or phenyl, X represents oxygen or sulphur, and Y represents halogen, alkyl with 1-8 carbon atoms, cyano or nitro which possess fungicidal properties.
Nickel-catalyzed hydrogenative coupling of nitriles and amines for general amine synthesis
作者:Vishwas G. Chandrashekhar、Wolfgang Baumann、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1126/science.abn7565
日期:2022.6.24
Efficient and general methods for the synthesis of amines remain in high demand in the chemical industry. Among the many known processes, catalytic hydrogenation is a cost-effective and industrially proven reaction and currently used to produce a wide array of such compounds. We report a homogeneous nickel catalyst for hydrogenative cross coupling of a range of aromatic, heteroaromatic, and aliphatic