Zobrazeno 1 - 10 of 18 pro vyhledávání: '"Yunnus B. Shaikh"'
1
Akademický článek
Total synthesis of (±)-coerulescine and (±)-horsfiline
Autor: Mukund G. Kulkarni, Attrimuni P. Dhondge, Sanjay W. Chavhan, Ajit S. Borhade, Yunnus B. Shaikh, Deekshaputra R. Birhade, Mayur P. Desai, Nagorao R. Dhatrak
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 6, Iss 1, Pp 876-879 (2010)
Wittig olefination–Claisen rearrangement protocol was applied to obtain 3-allyl oxindole. This oxindole was then converted to (±)-coerulescine and (±)-horsfiline.
Externí odkaz: https://doaj.org/article/3426423e3eac4dcf9aa15f4f00d8f82d
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2
Akademický článek
Zeolite catalyzed solvent-free one-pot synthesis of dihydropyrimidin-2(1H)-ones – A practical synthesis of monastrol
Autor: Mukund G. Kulkarni, Sanjay W. Chavhan, Mahadev P. Shinde, Dnyaneshwar D. Gaikwad, Ajit S. Borhade, Attrimuni P. Dhondge, Yunnus B. Shaikh, Vijay B. Ningdale, Mayur P. Desai, Deekshaputra R. Birhade
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 5, Iss 1, p 4 (2009)
A zeolite-catalyzed, simple, one-pot, solvent-free, cost effective, and environmentally benign process for the synthesis of dihydropyrimidones is described. This reaction is scaleable to multigram scale and the catalyst is recyclable. This methodolog
Externí odkaz: https://doaj.org/article/ec6a402456bb4308b6ca1a459369c8c0
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3
Synthesis of Isoquinoline-Fused Quinazolinones through Ag(I)-Catalyzed Cascade Annulation of 2-Aminobenzamides and 2-Alkynylbenzaldehydes
Autor: Yunnus B. Shaikh, Mamoru Koketsu, Dinesh R. Garud, Amol D. Sonawane
Publikováno v: Synthesis. 51:500-507
A new route for the expedient synthesis of a specific regioisomer of isoquinoline-fused quinazolinones is reported. Silver(I)-catalyzed cascade cyclization of 2-aminobenzamides and 2-alkynylbenzaldehydes followed by in situ oxidation gives 12-butyl-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7eb742570e2b2d7a717c5b23c1764879
https://doi.org/10.1055/s-0037-1610910
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4
A Wittig-olefination–Claisen-rearrangement approach to the 3-methylquinoline-4-carbaldehyde synthesis
Autor: Yunnus B. Shaikh, Mukund G. Kulkarni, Ajit N Dhatrak, Ramesh Gannimani, Deekshaputra R. Birhade, Mayur P. Desai
Publikováno v: Beilstein Journal of Organic Chemistry
Beilstein Journal of Organic Chemistry, Vol 8, Iss 1, Pp 1725-1729 (2012)
Efficient syntheses are described for the synthetically important 3-methylquinoline-4-carbaldehydes 6a–h from o-nitrobenzaldehydes 1a–h employing a Wittig-olefination–Claisen-rearrangement protocol. The Wittig reaction of o-nitrobenzaldehydes w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70caf0bb98e56fb9005115c7668cc161
http://europepmc.org/articles/PMC3511006
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6
A stereodivergent approach to carbahexofuranoses: synthesis of carba-α-d-glucofuranose, carba-β-d-altrofuranose, carba-α-d-allofuranose, carba-β-d-idofuranose, carba-α-d-galactofuranose and carba-β-d-talofuranose
Autor: Deekshaputra R. Birhade, Attrimuni P. Dhondge, Mukund G. Kulkarni, Nagorao R. Dhatrak, Ajit S. Borhade, Yunnus B. Shaikh
Publikováno v: Tetrahedron Letters. 52:5559-5562
A stereodivergent route, starting from d -glyceraldehyde derivative, employing Wittig olefination–Claisen rearrangement protocol is reported for the synthesis of six novel carbahexofuranoses—carba-α- d -glucofuranose, carba-β- d -altrofuranose,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1233c6149bd8ded138a77013af5454ba
https://doi.org/10.1016/j.tetlet.2011.08.006
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7
The efficient synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol and its isomers
Autor: Ajit S. Borhade, Yunnus B. Shaikh, Sanjay W. Chavhan, Attrimuni P. Dhondge, Deekshaputra R. Birhade, Ramesh Gannimani, Mayur P. Desai, Nagorao R. Dhatrak, Mukund G. Kulkarni
Publikováno v: Tetrahedron: Asymmetry. 21:2394-2398
The stereoselective synthesis of all the possible stereoisomers of bis-tetrahydrofyran alcohol, a ligand used for obtaining HIV protease inhibitors including Darunavir 1 and Brecanavir 2 has been achieved. A key intermediate 4-pentenal 5 was obtained
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f0d240a06d058f50b1a381709adaf590
https://doi.org/10.1016/j.tetasy.2010.08.005
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8
Total synthesis of (±)-coerulescine and (±)-horsfiline
Autor: Attrimuni P. Dhondge, Sanjay W. Chavhan, Mukund G. Kulkarni, Mayur P. Desai, Deekshaputra R. Birhade, Nagorao R. Dhatrak, Yunnus B. Shaikh, Ajit S. Borhade
Publikováno v: Beilstein Journal of Organic Chemistry
Beilstein Journal of Organic Chemistry, Vol 6, Iss 1, Pp 876-879 (2010)
Wittig olefination–Claisen rearrangement protocol was applied to obtain 3-allyl oxindole. This oxindole was then converted to (±)-coerulescine and (±)-horsfiline.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cabf6381597c65779a10bd39bbeaa14a
http://europepmc.org/articles/PMC2982140
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9
Wittig Olefination–Claisen Rearrangement Protocol for Cyclohexene Annulation
Autor: Deekshaputra R. Birhade, Attrimuni P. Dhondge, Sanjay W. Chavhan, Mayur P. Desai, Vijay B. Ningdale, Ajit S. Borhade, Yunnus B. Shaikh, Dnyaneshwar D. Gaikwad, Mukund G. Kulkarni
Publikováno v: Synthetic Communications. 40:423-433
A two-step iterative sequence of Wittig olefination followed by Claisen rearrangement resulted in 1,7-octadienes, which afforded the corresponding cyclohexene carbaldehydes upon ring-closing metathesis with Grubbs catalyst.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95c4f2faaf471ddf4fa81646db18840d
https://doi.org/10.1080/00397910902985473
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10
Greening the Wacker process
Autor: Attrimuni P. Dhondge, Sanjay W. Chavhan, Dnyaneshwar D. Gaikwad, Mayur P. Desai, Yunnus B. Shaikh, Mukund G. Kulkarni, Nagorao R. Dhatrak, Ajit S. Borhade, Deekshaputra R. Birhade
Publikováno v: Tetrahedron Letters. 54:2293-2295
Wacker oxidation of various terminal olefins with Pd0/C-KBrO3, a nontoxic, environmentally benign, and easy to handle catalyst system, was achieved in high isolated yields. The described protocol offers an alternative to the traditional Wacker system
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::008808ede8a3e750c3fca86257537576
https://doi.org/10.1016/j.tetlet.2013.01.082
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