M(NO 3)2 · X H 2 O,TNCB,TBAP和HMTAI对1,4-二氢吡啶进行快速有效的芳构化,并由硝苯地平d 3制备氘标记的脱氢硝苯地平
摘要:
在100°C的乙酸中,使用各种金属硝酸盐,溴化三硝酸铈(IV)溴酸盐(TNCB)和高碘酸四丁铵(TBAP)作为氧化剂,研究了各种1,4-二氢吡啶的简便有效芳构化。碘(HMTAI)在甲醇中回流。nifedipine-的有效转化d 3至dehydronifedipine- d 3作为内标可以以硝苯地平浓度的在体内测定中使用。
Introduction of alkyl groups on azodicarboxylate esters is an important method to prepare alkyl aminederivatives. Herein, we report reactions of 4-alkyl-1,4-dihydropyridines as alkylation reagents with di-tert-butyl azodicarboxylate to prepare alkyl aminederivatives under heating conditions. The alkylation reactions via C–C bond cleavage of the dihydropyridines are achieved in the absence of catalysts
nickel-catalyzed alkylative cyclizationreactions of iodoalkynes with 4-alkyl-1,4-dihydropyridines as alkylation reagents under visible light irradiation have been achieved to afford the corresponding alkylated cyclopentylidenes in good to high yields. Introduction of substituents at the propargylic position of iodoalkynes has led to the stereoselective formation of E-isomers. The present reaction system provides
Metal free biomimetic deaminative direct C–C coupling of unprotected primary amines with active methylene compounds
作者:Santanu Ghosh、Chandan K. Jana
DOI:10.1039/c9ob02163a
日期:——
unprecedented direct C–C coupling reaction of unprotected primary amines with active methylene compounds is reported. The reaction involves a biomimetic deamination of amines which was achieved under conditions free of metallic reagents and strong oxidizing agents. A wide range of primary amines was reacted with different active methylene compounds to provide structurally diverse trisubstituted alkenes and
Potassium permanganate, a versatile reagent for the aromatization of Hantzsch 1,4-dihydropyridines
作者:Jean-Jacques Vanden Eynde、Rita D'Orazio、Yves Van Haverbeke
DOI:10.1016/s0040-4020(01)86964-7
日期:1994.2
A variety of Hantzsch esters have been oxidized with potassium permanganate. The structure of the final products dramatically depends on the nature of the 4-substituent and on the experimental conditions.
各种Hantzsch酯已被高锰酸钾氧化。最终产物的结构极大地取决于4-取代基的性质和实验条件。
Paraskar, Abhimanyu S.; Sudalai, Arumugam, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2007, vol. 46, # 2, p. 331 - 335