Zobrazeno 1 - 10
of 104
pro vyhledávání: '"D. N. Dhar"'
Autor:
Anil Kumar Singh, D. N. Dhar
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 93:129-131
Hederagenin on treatment with concentrated sulphuric acid at −5–0°C underwent a rearrangement leading to the formation of a new triterpenoidal skeleton, 3-isopropylidene-A-nor-5-β-methyl-Δ910-oleanenolactone.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb89a2f5a1f4af06c31950dfd8316e8b
https://doi.org/10.1002/bscb.19840930206
https://doi.org/10.1002/bscb.19840930206
Autor:
E. Sampath Kumar, D. N. Dhar
Publikováno v:
Synthetic Communications. 25:1939-1945
Reaction between the 1-aroyl-2-arylcyclopropane (cyclopropyl chalcone) with chlorosulfonyl isocyanate leads to the formation of seven membered heterocyclic product, namely, oxazepine-2-one.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aef3d82468820df52ad22d182fe1b8f6
https://doi.org/10.1080/00397919508015870
https://doi.org/10.1080/00397919508015870
Autor:
D. N. Dhar, Pramod Kumar
Publikováno v:
Synthetic Communications. 25:1933-1938
Cyclization of 2′-aminochalcones 1a-e with chlorosulfonyl isocyanate (CSI), at low temperature, afforded 2(1H)-quinazolinone 2a-e and 1H-2,1,3-benzothiadiazine 2,2-dioxide 3a-e derivatives.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07a3dc2c8c0831d351e99fdfd8a54625
https://doi.org/10.1080/00397919508015869
https://doi.org/10.1080/00397919508015869
Autor:
Joseph Daniel, D. N. Dhar
Publikováno v:
Synthetic Communications. 23:2151-2157
A facile synthesis of 4,7-diaryl-1,3,6-trihydro-1,3,6-triazocin-2-ones and 5,8-diaryl-3,6-dihydro-1,3,6-oxadiazocin-2-ones is reported by the interaction of cholorosulfonyl and 2H-azirines.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fe735b57bff4d58761bfeea77b89956
https://doi.org/10.1080/00397919308018610
https://doi.org/10.1080/00397919308018610
Autor:
Joseph Daniel, D. N. Dhar
Publikováno v:
Synthetic Communications. 23:121-129
2-Alkylthiazolines and oxazolines undergo cyclization reaction with chlorosulfonyl isocyanate to give thiazole and oxazole fused thiadiazine derivatives.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31360642ab58f6892d2c3ffdd030388f
https://doi.org/10.1080/00397919308020410
https://doi.org/10.1080/00397919308020410
Autor:
Joseph Daniel, D. N. Dhar
Publikováno v:
ChemInform. 23
Chlorosulfonyl isocyanata (CSI) reacts with 2H-azirines 1 a-c at -78°C to form [2+2+2] cycloadducts 3a-c and 4a-c. The tricyclic aziridine derivatives 4a-c undergo CSI extrusion reactions and subsequent oxidation to the corresponding pyrazines 5a-c.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c881f4eaf45f2e95f672cb7ba64aa5c7
https://doi.org/10.1002/chin.199211068
https://doi.org/10.1002/chin.199211068
Autor:
D. N. Dhar, J. Daniel
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e418d4facc381fde55473b72c3565a10
https://doi.org/10.1002/chin.199204215
https://doi.org/10.1002/chin.199204215
Autor:
J. Daniel, D. N. Dhar
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d082129ea24fc3e9cd44e6e14b7c3394
https://doi.org/10.1002/chin.199211198
https://doi.org/10.1002/chin.199211198
Autor:
D. N. Dhar, Joseph Daniel
Publikováno v:
ChemInform. 23
The reaction of chlorosulfonyl isocyanate with arylmethylenemalonaldehydes afforded the fused 1,3-oxazin-2-one derivatives.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b25fec9b98cdc65f3b83425b292b2f37
https://doi.org/10.1002/chin.199239221
https://doi.org/10.1002/chin.199239221
Publikováno v:
ChemInform. 24
A facile synthesis of oxazepinone derivatives is reported by the interaction of vinyloxiranes and chlorosulfonyl isocyanate. A 1,5 to 1,7-dipolar rearrangement of the initially formed adduct, followed by ring closure is proposed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e8617bfc0473233ecbaa789df650089
https://doi.org/10.1002/chin.199313220
https://doi.org/10.1002/chin.199313220