摘要:

AbstractThe infrared spectra of a series of 4‐hydroxy‐ and 4‐mercaptocinnolines substituted with fluorine, chlorine or bromine in the 5‐, 6‐, 7‐ and 8‐position have been obtained in potassium bromide discs between 4000 and 400 cm−1. Assignments for most of these bands

ISSN:0022-152X    

DOI:10.1002/jhet.5570010501

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractA 1,2‐disubstituted‐2‐imidazoline was hydrolyzed in aqueous solutions of varyingPH. The rate of reaction approaches a maximum as the base concentration is increased. Salt effects and activation energies also seem to vary w

ISSN:0022-152X    

DOI:10.1002/jhet.5570010502

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractThe photolysis of difluorodiazirine is a convenient technique for the formation of difluorocarbene. Difluorocarbene, generated in this manner, has been shown to react with chlorine, iodine, dinitrogen tetroxide and nitryl chloride to yield the corresponding difluoromethane derivatives.

ISSN:0022-152X    

DOI:10.1002/jhet.5570010503

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractDerivatives of l‐methyl‐3H‐1, 4‐benzodiazepine‐2,5(1H, 4H)‐dione were synthesized by ring closure of substituted 2[(N‐chloroacetyl‐N‐methyl)amino]benzamides with sodium meth

ISSN:0022-152X    

DOI:10.1002/jhet.5570010504

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractThe preparation of indazole‐3‐carboxylic acids from the appropriate isatins by von Auwers' method has been investigated; these acids were used for acceding to the corresponding indazoles and for preparing hydrazides and hydrazones in the indazole ser

ISSN:0022-152X    

DOI:10.1002/jhet.5570010505

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractBromination of β‐3‐thienylacrylic acid in glacial acetic acid gave β‐(2‐bromo‐3‐thienyl)‐acrylic acid with an equivalent of bromine, and β‐(2,5‐dibromo‐3‐thienyl)‐α,β‐dibromo‐propionic acid with excess bromine. In hot carbon tetrachloride, an excellent yield of the stable olefinic addition product, β‐3‐thienyl‐α,β‐dibromopropionic acid, was obtained, and its structure was confirmed by conversion to β‐bromo‐3‐thienylethylene in base. 3‐Thenaldehyde underwent a Darzen's Glycidic Ester condensation to produce ethyl β‐3‐thienyl‐α,β‐epoxypropionate, but treatment of this ester or the salt of its derived acid with hydrogen bromide led to the formation of unstable products. The structure of the bromo‐acids and derivatives were confirmed by u

ISSN:0022-152X    

DOI:10.1002/jhet.5570010506

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractThe preparations of the compounds noted in the title are described. The reduction of l‐hydroxy‐3‐(2‐hydroxyphenyl)quinazoline‐2, 4‐dione (III) catalyzed by Raney nickel provided 3‐(2‐hydroxyphenyl)quinazoline

ISSN:0022-152X    

DOI:10.1002/jhet.5570010507

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractThe free ring system,v‐triazolo[4, 5‐clpyridazine and several derivatives in this ring system such as the adenine analog, 7‐amino‐v‐triazolo[4, 5‐clpyridazine, have been prepared. In addition, the fully aromatic pyrazino[2, 3‐clpyridazine ring system has been prepared for t

ISSN:0022-152X    

DOI:10.1002/jhet.5570010508

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractThe alkaloid calycotomine has been synthesized in 44% overall yield by use of the Reissert compound of 6, 7‐dimethoxyisoquinolin

ISSN:0022-152X    

DOI:10.1002/jhet.5570010509

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY

摘要:

AbstractA method for the hydrolysis of acetoxyflavones with catalytic amounts of imidazole in 60% ethanol or 60% methanol is described. The method has been applied to the acetates of monohydroxyflavones, polyhydroxyflavones, and the trihydroxyflavones naringenin and hesperetin. Partial deacetylation of quercitrin heptaacetate is described. The methane‐sulfonates of several monohydroxyflavones, and the stability of flavonol methanesulfonate in the imidazole‐ethanol reagent are repor

ISSN:0022-152X    

DOI:10.1002/jhet.5570010510

出版商:Wiley‐Blackwell    

年代:1964

数据来源: WILEY