摘要:

AbstractThe 1‐aryl‐2‐imidazo[1,2‐b]isoquinolin‐4‐ium system (3and4), prepared by the action of aniline, or a suitable aniline derivative upon 2‐phenacyl‐3‐chloroisoquinolinium bromide undergoes cycloaddition reactions only with the more nucleophilic alkenes such as cyclopentadiene or 9‐vinylcarbazole.The pyrazino[1,2‐b]isoquinolin‐5‐ium‐2‐oxide (8–10) system reacts with nucleophilic alkenes more readily than does the acridizinium system 1. For both systems the cycloaddition appears to occur across them

ISSN:0022-152X    

DOI:10.1002/jhet.5570090201

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractCertainC(α)O‐dilithiooximes,C(α)N‐dilithiophenylhydrazones, andC(α)N,N‐trilithiohydrazones were treated with a variety of nitriles. The intermediates were not isolated, but cyclized with acid to give isoxazoles or p

ISSN:0022-152X    

DOI:10.1002/jhet.5570090202

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractThe crystal and molecular structure of 1,1,2,4,4,5‐hexaphenyl‐1,4‐diphosphoniacyclohexadiene‐2,5 dibromide has been determined by a single crystal, x‐ray diffraction study using diffractometer data. The compound crystallizes in the space group P21/cwith unit cell constants a = 8.813(1), b = 36.736(4), c = 12.478(1) Å, and β = 120.91°(1). The structure was solved by the heavy atom method and refined by block‐diagonal least‐squares to a final R = 0.04 for the 2761 statistically significant reflections. The structure determination shows that the central phosphonium ring is a diene and not a delocalized structure as anticipated. The ring is in the boat conformation with the axial phenyl rings aligned essentially parallel to each other

ISSN:0022-152X    

DOI:10.1002/jhet.5570090203

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractSix isomeric methylphenyl‐1,2,3,4‐tetrahydro‐4‐oxoquinazolines have been prepared and their fragmentation patterns upon electron impact studied. Deuterium labelling and high‐resolution measurements were performed in order to facilitate the interpretation of the spectra. The dissociation of the molecular ion follows two main routes, the fragmentation being governed by the position of the phe

ISSN:0022-152X    

DOI:10.1002/jhet.5570090204

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractSeveral 2‐alkyl‐5‐(4‐biphenylyl)‐1,3,4‐oxadiazoles have been synthesized and investigated as primary liquid scintillation solutes and are found to be excellent fluors. Fluorescence studies at varying concentrations and temperatures indicate that excimer formation is possible at high concentration and low t

ISSN:0022-152X    

DOI:10.1002/jhet.5570090205

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractA procedure is presented which allows the conversion of glycine to creatinine (1‐methyl‐2‐amino‐2‐imidazolin‐4‐one). The scheme was devised to optimize the yield based on the amount of glycine used so that the relatively readily available isotopically labeled glycines could be efficiently converted to the correspondingly labeled creatinines. In this case 1‐(13C)‐glycine was converted to 4‐(13C)‐1‐methyl‐2

ISSN:0022-152X    

DOI:10.1002/jhet.5570090206

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractThe reactions of 3‐phenylsydnonyllithium with a variety of ketones to afford tertiary carbinols4a‐4iand their subsequent dehydration to 4‐(3‐phenylsydnonyl) alkenes5a‐5iare discussed. Among the alkenes, 2‐[4‐(3‐phenylsydnonyl)]propene (5b) and 1‐[4‐(3‐phenylsydnonyl)]‐1‐cyclohexene (5i) were photochromic. A Wittig reaction between ethyl‐4‐(3‐phenylsydnonyl)‐ketone and methylenetriphenylphosphorane afforded the photochromic 2‐[

ISSN:0022-152X    

DOI:10.1002/jhet.5570090207

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractTreatment of 3,5‐dichloro‐2‐pyridone with various benzenesulfonyl chlorides in the presence of triethylamine at 25° yielded bothO‐ andN‐sulfonylated products. These isomers were isolable, relatively stable compounds which were distinguished by their ir and

ISSN:0022-152X    

DOI:10.1002/jhet.5570090208

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractA number of 3‐mono‐ and 3,3‐disubstituted derivatives of 1‐methyl 2,1‐benzisothiazoline 2,2‐dioxide (IIa), a unique benzosultam, were synthesized. Starting materials for the condensation and aminoalkylation reactions utilized were IIa and the 3‐methyl compound IIb, which were prepared by cyclization of the 2′‐chloro‐N‐methylalkylsulfonanilides, I

ISSN:0022-152X    

DOI:10.1002/jhet.5570090209

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY

摘要:

AbstractThe photostabilities and syntheses of 2,2′‐bis(o‐hydroxyphenyl)‐5,5′‐bipyrimidine, 6,6′‐bis(o‐hydroxyphenyl)‐3,3′‐bipyridine and 3,8‐bis(o‐hydroxyphenyl)‐4,7‐phenanthroline are discussed. The syntheses of parent compounds lacking theo‐

ISSN:0022-152X    

DOI:10.1002/jhet.5570090210

出版商:Wiley‐Blackwell    

年代:1972

数据来源: WILEY