使用计算和实验技术研究了C x F 2 x +1 CHO(x = 1-4)的紫外和红外光谱。C x F 2 x +1 CHO(x = 1-4)具有在300-310 nm处集中的宽紫外线吸收功能。随着C x F 2 x +1基团长度的增加,最大吸收截面显着增加,并向红色略微偏移:CF 3 CHO,3.10×10 -20(300 nm); C 2 F 5 CHO,6.25×10 -20(308nm);m / z。C 3 F7 CHO,8.96×10 -20(309 nm); 和C 4 F 9 CHO,10.9×10 -20(309nm)。记录,计算和分配C x F 2 x +1 CHO的红外光谱。关于文献数据和CxF2x + 1CHO的大气命运讨论了结果。
Study of Fluorocarbonyls for the Baylis−Hillman Reaction
作者:M. Venkat Ram Reddy、Michael T. Rudd、P. Veeraraghavan Ramachandran
DOI:10.1021/jo025591l
日期:2002.7.1
A study of the effect of fluorine substitution in Baylis-Hillman reactions of various fluorocarbonyl partners with acrolein, methyl vinyl ketone, ethyl acrylate, and acrylonitrile has been made.
Defluorinative [4 + 1] annulation of perfluoroalkyl <i>N</i>-mesylhydrazones with primary amines provides 5-fluoroalkyl 1,2,3-triazoles
作者:Yongquan Ning、Hongwei Wang、Paramasivam Sivaguru、Shuang Li、Giuseppe Zanoni、Steven P. Nolan、Xihe Bi
DOI:10.1039/d1gc02749b
日期:——
blocks. However, only a few synthetic routes to these compounds are currently available. Herein, we report on a novel method to access 5-fluoroalkyl 1,2,3-triazoles from easily prepared bench-stable perfluoroalkyl N-mesylhydrazone (PFHZ-Ms), a reagent that can transform amines to 5 fluoroalkyl 1,2,3-triazoles via defluorinative [4 + 1] annulation. The simple reaction protocol can be applied to a variety
作者:Kenneth L. Kees、Ted M. Smith、Michael L. McCaleb、Dorothy H. Prozialeck、Robert S. Cheeseman、Thomas E. Christos、William C. Patt、Kurt E. Steiner
DOI:10.1021/jm00083a021
日期:1992.3
In a preliminary communication (J. Med. Chem. 1989, 32, 11-13) a series of perfluoro-N-[4-(1H-tetrazol-5ylmethyl)phenyl]alkana mides (perfluoro anilides I), designed as novel analogues of ciglitazone, were reported to possess oralantidiabetic activity in two genetic animal models of non-insulin-dependent diabetes mellitus (NIDDM): obese (ob/ob) and diabetic (db/db) mice. In this report, the results
ZP(+)-HP- ion pairs have been estimated. Similar biphasic fluorescence decay has been observed for 5 ZH in benzene; this allows furhter estimation of the energy level of the ZP(+)-HP- ion pairs. The free-energy-gap dependence (energy-gap law) has been probed from the normal to the upperlimit region for the rate of the charge separation alone, and only the inverted region for the rate of the charge
Asymmetric synthesis of quaternary α-fluoro-β-keto-amines via detrifluoroacetylative Mannich reactions
作者:Chen Xie、Yanling Dai、Haibo Mei、Jianlin Han、Vadim A. Soloshonok、Yi Pan
DOI:10.1039/c5cc02256h
日期:——
Asymmetric detrifluoroacetylative Mannich reactions of N-sulfinyl-imines via C–C bond cleavage were explored, which provide access to C–F quaternary α-fluoro-β-keto-amines.