Hydrolysis of ethers of 2,4-dinitrophenol. No evidence for a single electron transfer mechanism
摘要:
The reactions of 3-butenyl 2,4-dinitrophenyl ether (1), allyl 2,4-dinitrophenyl ether (5), and n-butyl 2,4-dinitrophenyl ether (6) with KOH in two DMSO-water mixtures (50% v/v and 70% v/v) were studied. In all cases, no evidence was found for a single electron transfer mechanism; 2,4-dinitrophenol was the only product formed. The reaction follows the classical S(N)Ar mechanism. The order of reactivity is 5 > 1 > 6 in both solvents, although the reactivities differ only by factors of 1.4 and 2 in 50 and 70% DMSO, respectively.
Hydrolysis of ethers of 2,4-dinitrophenol. No evidence for a single electron transfer mechanism
摘要:
The reactions of 3-butenyl 2,4-dinitrophenyl ether (1), allyl 2,4-dinitrophenyl ether (5), and n-butyl 2,4-dinitrophenyl ether (6) with KOH in two DMSO-water mixtures (50% v/v and 70% v/v) were studied. In all cases, no evidence was found for a single electron transfer mechanism; 2,4-dinitrophenol was the only product formed. The reaction follows the classical S(N)Ar mechanism. The order of reactivity is 5 > 1 > 6 in both solvents, although the reactivities differ only by factors of 1.4 and 2 in 50 and 70% DMSO, respectively.
Iodotrifluoromethylation of Alkenes and Alkynes with Sodium Trifluoromethanesulfinate and Iodine Pentoxide
作者:Zhaojia Hang、Zejiang Li、Zhong-Quan Liu
DOI:10.1021/ol501380e
日期:2014.7.18
A scalable, selective, and operationally easy iodotrifluoromethylation of a wide range of alkenes and alkynes by using two simple and safe solids, sodiumtrifluoromethanesulfinate and iodine pentoxide, in aqueous medium has been developed. Mechanistic studies confirm that free-radical processes are involved in this system since the key radical intermediates such as CF3 and β-CF3 alkyl radicals have
Hydrolysis of ethers of 2,4-dinitrophenol. No evidence for a single electron transfer mechanism
作者:Elba B. de Vargas、Eduardo L. Setti、Mario L. Aimar、Rita H. de Rossi
DOI:10.1021/jo00078a012
日期:1993.12
The reactions of 3-butenyl 2,4-dinitrophenyl ether (1), allyl 2,4-dinitrophenyl ether (5), and n-butyl 2,4-dinitrophenyl ether (6) with KOH in two DMSO-water mixtures (50% v/v and 70% v/v) were studied. In all cases, no evidence was found for a single electron transfer mechanism; 2,4-dinitrophenol was the only product formed. The reaction follows the classical S(N)Ar mechanism. The order of reactivity is 5 > 1 > 6 in both solvents, although the reactivities differ only by factors of 1.4 and 2 in 50 and 70% DMSO, respectively.