Directed synthesis of new spiro-fused photochromes of diarylethene series
摘要:
The reaction of tetracyanoethylated 1,2-diarylethanones with morpholine was used for directed synthesis of spiro-fused diarylethenes, 8-amino-1-imino(oxo)-6-morpholino-2-oxa-7-azaspiro[4.4]nona-3,6,8-triene-9-carbonitriles. The intermediates in this process were tetracyanoalkanone salts. The formation of spiranes was sensitive to the nature of aromatic substituents at the carbonyl group of 3,4-diaryl-4-oxobutane-1,1,2,2-tetracarbonitriles. The obtained spiro-fused diarylethenes exhibited photochromic properties.
Transition-Metal-Free Intermolecular α-Arylation of Ketones via Enolonium Species
作者:Shimon Maksymenko、Keshaba N. Parida、Gulab K. Pathe、Atul A. More、Yuriy B. Lipisa、Alex M. Szpilman
DOI:10.1021/acs.orglett.7b03064
日期:2017.12.1
Herein it is shown, for the first time, that enolonium species are powerful electrophiles capable of reacting with aromatic compounds in an intermolecular manner to afford α-arylated ketones. The reaction is compatible with a variety of functional groups, is of wide scope with respect to aromatic compounds and ketone, and even works for polymerization-prone substrates such as substituted pyrroles,
Rearrangement of 4-oxoalkane-1,1,2,2-tetracarbonitriles in the directed synthesis of aryl-substituted 2-(3-cyano-5-hydroxy-1,5-dihydro-2H-pyrrol-2-ylidene)malononitriles
作者:Mikhail Yu. Belikov、Sergey V. Fedoseev、Mikhail Yu. Ievlev、Oleg V. Ershov
DOI:10.1007/s10593-017-2170-1
日期:2017.9
3-Aryl-4-oxoalkane-1,1,2,2-tetracarbonitriles were synthesized by the interaction of 2-aryl ketones with tetracyanoethylene. Directed rearrangement of them in acetic acid in the presence of ammonium acetate led to the formation of 2-(3-cyano-5-hydroxy-1,5-dihydro-2Hpyrrol-2-ylidene)malononitriles containing an aryl substituent in conjugation with the acceptor buta-1,3-diene-1,1,3-tricarbonitrile moiety
Behavior of Benzoins and Hydroxy ketones in Acid Media: I. Reaction of 1-Aryl-2-(2,5-dimethylthiophen-3-yl)-2-hydroxyethanones with Thiols in Trifluoroacetic Acid
作者:M. M. Krayushkin、B. V. Lichitskii、A. P. Mikhalev、A. A. Dudinov、S. N. Ivanov
DOI:10.1007/s11178-005-0125-y
日期:2005.1
Reactions of 1-aryl-2-(2,5-dimethylthiophen-3-yl)-2-hydroxyethanones with thiols in trifluoroacetic acid lead to formation of substituted 1-aryl-2-(2,5-dimethylthiophen-3-yl)-2-sulfanylethanones.