Cascade Radical 1,6-Addition/Cyclization of para-Quinone Methides: Leading to Spiro[4.5]deca-6,9-dien-8-ones.
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DOI: 10.1021/acs.orglett.8b00518
Abstract: A cascade three-component iodoazidation of para-quinone methides to construct spiro[4.5]deca-6,9-dien-8-ones under mild conditions has been developed. The chemoselective 1,6-addition of azide radical triggered a regioselective 5-exo-dig cyclization/radical coupling sequence, enabling C-N, C-C, and C-I bond… read more here.
Keywords: spiro deca; quinone methides; dien ones; para quinone ... See more keywords
Selective syntheses of diversely substituted 2-hydroxy-4′-hydroxybenzophenones through [4 + 2] or [3 + 3] annulation of penta-3,4-dien-2-ones with 3-formylchromones
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DOI: 10.1039/c7qo00366h
Abstract: A selective synthesis of 2-hydroxy-4′-hydroxybenzophenones or their 3′-acylated counterparts through the cascade reactions of 3-formylchromones with diversely substituted penta-3,4-dien-2-ones is presented. Mechanistically, the formation of the title compounds involves either an unprecedented [4 + 2]… read more here.
Keywords: annulation; hydroxy hydroxybenzophenones; dien ones; selective syntheses ... See more keywords
Novel Asymmetric Thiazolyl-Substituted Penta-1,4-Dien-3-Ones and 3,5-Diaryl-2-Pyrazolines
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DOI: 10.1080/10406638.2020.1858882
Abstract: Various diaryl/hetaryl representatives of penta-1,4-dien-3-one series attract the attention of synthetic chemists during several decades owing to the possibility of their consequent chemical modifi... read more here.
Keywords: substituted penta; asymmetric thiazolyl; novel asymmetric; dien ones ... See more keywords
Reactions of phosphorylated 2,6-di-tert-butyl-4-methylidenecyclohexa-2,5-dien-1-ones with aliphatic, aromatic, and heteroaromatic thiols
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DOI: 10.1134/s107036321705036x
Abstract: The addition of alkanethiols, benzenethiol, and hetarenethiols to phosphorylated quinomethanes afforded P,S- and N,P,S-containing polyfunctional organic compounds as potential bactericidal agents. read more here.
Keywords: phosphorylated tert; methylidenecyclohexa dien; dien ones; reactions phosphorylated ... See more keywords