Selective construction of indeno[1,2-b]phenothiazine and indeno[2,1-c]phenothiazine via tandem annulation reaction
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron"
DOI: 10.1016/j.tet.2018.04.062
Abstract: Abstract AcOH promoted annulation reaction of 2-arylideneindane-1,3-diones with methyl 2-(benzo[b][1,4]thiazin-3-ylidene)acetate in refluxing ethanol afforded pentacyclic tetrahydroindeno [1,2-b]phenothiazine in satisfactory yields and with high diastereoselectivity according to the unexpected tandem annulation process. When the above reaction… read more here.
Keywords: phenothiazine; indeno phenothiazine; annulation reaction; tandem annulation ... See more keywords
Rhodium-Catalyzed Tandem C-H Annulation Enabled by Transient Directing Group Strategy and Sequential Nucleophilic Substitution.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c02853
Abstract: A novel protocol of rhodium-catalyzed tandem C-H annulation of aldehyde and aniline with diazonaphthalen-1(2H)-one via transient directing group strategy and sequential nucleophilic substitution has been demonstrated in moderate to excellent yields. This reaction proceeds smoothly… read more here.
Keywords: nucleophilic substitution; catalyzed tandem; rhodium catalyzed; tandem annulation ... See more keywords
Phosphine-Catalyzed Tandem Annulation of Allenylic Alcohols with 1,1-Dicyanoalkenes.
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DOI: 10.1021/acs.orglett.3c01066
Abstract: The phosphine-catalyzed tandem annulation of allenylic alcohols with 1,1-dicyanoalkenes has been developed, giving various bicyclic tetrahydrocyclopentafuran derivatives in 40-89% yields with moderate to excellent diastereoselectivities. The fused ring was furnished through a sequential (3 +… read more here.
Keywords: catalyzed tandem; annulation; allenylic alcohols; phosphine catalyzed ... See more keywords
Recent advances in the tandem annulation of 1,3-enynes to functionalized pyridine and pyrrole derivatives
Sign Up to like & getrecommendations! Published in 2021 at "Beilstein Journal of Organic Chemistry"
DOI: 10.3762/bjoc.17.163
Abstract: Great progress has been made in the tandem annulation of enynes in the past few years. This review only presents the corresponding reactions of 1,3-enyne structural motifs to provide the functionalized pyridine and pyrrole derivatives.… read more here.
Keywords: pyridine pyrrole; pyrrole derivatives; annulation enynes; functionalized pyridine ... See more keywords