Zobrazeno 1 - 10
of 459
pro vyhledávání: '"Ernest Wenkert"'
Publikováno v:
CHIMIA, Vol 46, Iss 4 (1992)
Acetoxymaleic anhydride (AMA) has been shown to be a versatile ketene equivalent in the Diels-Alder reaction for the conversion of 1,3-dienes into cyclohexanones. The new transformation has been applied to an alternate synthesis of methyl cis-dihydro
Externí odkaz:
https://doaj.org/article/abebd57947394421bf3da951bc429a87
Publikováno v:
Synthetic Communications. 31:707-710
Diels-Alder reaction of cyclopentadiene and 1,3-cyclohexadiene with propiolic ester 6 under thermal and high pressure conditions gave an epimer mixture of ketoester 8 and 10, subsequently converted into bicyclic ketones 1 and 2.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e89c1f1bfad8f5f41fc50247aa13bc7d
https://doi.org/10.1081/scc-100103259
https://doi.org/10.1081/scc-100103259
Autor:
Ornelio Rosati, Ernest Wenkert, Francesco Epifano, Massimo Curini, Yousheng Guan, Maria Carla Marcotullio
Publikováno v:
Helvetica Chimica Acta. 83:755-759
The Kanematsu transformation was employed for the preparation of tetrahydroisobenzofuran-4-carboxylic acid (12), α-methylation, subsequent conversion into the diazoethanone 14, and, finally, treatment with dirhodium tetraacetate of which furnished t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4bd9c8a40626c2e7a6ba71d8bfd7a4f
https://doi.org/10.1002/(sici)1522-2675(20000412)83:4<755::aid-hlca755>3.0.co
https://doi.org/10.1002/(sici)1522-2675(20000412)83:4<755::aid-hlca755>3.0.co
Autor:
Haripada Khatuya, Ernest Wenkert
Publikováno v:
Synthetic Communications. 29:3051-3055
Callosobruchusic acid, a monoterpene dicarboxylic acid, has been prepared in five steps from 2-methylfuran and methyl α-diazopropionate.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc54ae36f0b2f11376392ebc7ecf1fa0
https://doi.org/10.1080/00397919908086482
https://doi.org/10.1080/00397919908086482
Autor:
Ernest Wenkert, Haripada Khatuya
Publikováno v:
Synthetic Communications. 29:2413-2417
A variety of oxidizing agents convert 5-hydroxy-4,5-dihydroisobenzo-furan into phthalaldehyde. Other oxidizing agents produce both phthalaldehyde and its 4-hydroxy derivative.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ead225f747152f59f98e3663914b0a9
https://doi.org/10.1080/00397919908086247
https://doi.org/10.1080/00397919908086247
Autor:
Haripada Khatuya, Ernest Wenkert
Publikováno v:
Tetrahedron Letters. 40:5439-5442
Reactions of various α-alkyl-substituted furans with ethyl diazoacetate or methyl diazopropionate in the presence of Rh2(OAc)4, followed by iodine-induced isomerization, yielded a variety of functionalized 1,3-diacyl-butadienes (furan ring-unravelle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca8c8e1f1a6ae7dbce8c6d52a393b269
https://doi.org/10.1016/s0040-4039(99)01062-x
https://doi.org/10.1016/s0040-4039(99)01062-x
Publikováno v:
Tetrahedron Letters. 40:5171-5174
Reactions of β-methylfuran and 2,4-dimethylfuran with ethyl diazoacetate in the presence of [Rh2(OAc)4] catalyst, followed by iodine-induced isomerization, yielded furan ring-unravelled products. The results are compared with those of α-methylfuran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::702669a2f7eb58fa9502bdcb6514fe22
https://doi.org/10.1016/s0040-4039(99)01007-2
https://doi.org/10.1016/s0040-4039(99)01007-2
Autor:
Ernest Wenkert, Haripada Khatuya
Publikováno v:
Helvetica Chimica Acta. 82:511-514
(±-(2E,4E)-2,7-Dimethylocta-2,4-dienedioic acid (1) was synthesized efficiently from furan, employing a rhodium-carbenoid-induced furan-ring-unravelling reaction followed by an unusual NaBH4/CeCl3⋅7 H2O reduction, Wittig-Horner olefination, and di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3adf7aeced72e0a2f660ff521be45a63
https://doi.org/10.1002/(sici)1522-2675(19990407)82:4<511::aid-hlca511>3.0.co
https://doi.org/10.1002/(sici)1522-2675(19990407)82:4<511::aid-hlca511>3.0.co
Autor:
Haripada Khatuya, Ernest Wenkert
Publikováno v:
Helvetica Chimica Acta. 81:2370-2374
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88248ce25dfebb9379efd6338a3b3353
https://doi.org/10.1002/(sici)1522-2675(19981216)81:12<2370::aid-hlca2370>3.0.co
https://doi.org/10.1002/(sici)1522-2675(19981216)81:12<2370::aid-hlca2370>3.0.co
Autor:
Song Liu, Ernest Wenkert
Publikováno v:
The Journal of Organic Chemistry. 59:7677-7682
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59216f75d5557f18b8240d9adb0f8967
https://doi.org/10.1021/jo00104a023
https://doi.org/10.1021/jo00104a023