Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Ongolu, Ravikumar"'
Autor:
Shravan Morla, Ongolu Ravikumar, Connor O’Hara, Rio Boothello, Alberto Vera, Elsamani I. Abdelfadiel, Rawan Fayyad, Daniel K. Afosah, Chetna Sharon, Leopoldo Fernandez, Syed Ammer Shah, Bhaumik B. Patel, Umesh R. Desai
Publikováno v:
Journal of Medicinal Chemistry. 66:1321-1338
Publikováno v:
European Journal of Organic Chemistry. 26
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 11, Iss 1, Pp 1503-1508 (2015)
A tricyclic lactam is reported in a four step synthesis sequence via Beckmann rearrangement and ring-rearrangement metathesis as key steps. Here, we used a simple starting material such as dicyclopentadiene.
Externí odkaz:
https://doaj.org/article/e6b43d1ccb3e4dedbd6a1daeacdeaf27
Autor:
Sambasivarao Kotha, Ongolu Ravikumar
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 11, Iss 1, Pp 1259-1264 (2015)
Atom efficient processes such as the Diels–Alder reaction (DA) and the ring-rearrangement metathesis (RRM) have been used to design new polycycles. In this regard, ruthenium alkylidene catalysts are effective in realizing the RRM of bis-norbornene
Externí odkaz:
https://doaj.org/article/289d1403886f4704ab9d7add91b419b0
Akademický článek
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Publikováno v:
Tetrahedron Letters. 58:1283-1286
Five stereochemically different 2:1 Diels–Alder adducts were prepared starting with cyclopentadiene and p-benzoquinone. Separately, these adducts were treated with an excess amount of base and allyl bromide to deliver two different tetra-allylated
Publikováno v:
Tetrahedron. 72:6611-6615
Norbornene derivatives containing oxygen atom(s) are found to undergo ring-rearrangement metathesis sequence to deliver cyclic ethers. Here, we have established a simple, efficient and an atom-economic process for the synthesis of fused and spiro-oxa
Autor:
Ongolu Ravikumar, Sambasivarao Kotha
Publikováno v:
European Journal of Organic Chemistry. 2016:3900-3906
Synthesis of fused azacycle via Overman rearrangement and ring-rearrangement metathesis as key steps
Autor:
Sambasivarao Kotha, Ongolu Ravikumar
Publikováno v:
Tetrahedron Letters. 57:1994-1996
A simple and concise approach to fused tricyclic compound containing five stereogenic centers and one nitrogen atom is described starting with a readily available building block dicyclopentadiene. This route involves the Overman rearrangement and rut
Autor:
Ongolu Ravikumar, Sambasivarao Kotha
Publikováno v:
Tetrahedron Letters. 55:5781-5784
Ring-rearrangement metathesis of norbornene derivatives prepared by Diels–Alder reaction has been used to design various oxa-bowls. Enyne ring-rearrangement metathesis of norbornene ring systems with propargyl moiety produced diene containing oxa-b