Pd-catalysed general access to 7-membered N/O-heterocyclic compounds as potential agents against inflammation
作者:B. Thirupataiah、Gangireddy Sujeevan Reddy、Guntipally Mounika、Jetta Sandeep Kumar、Kazi Amirul Hossain、Jayesh Mudgal、Jessy E. Mathew、Gautham G. Shenoy、Marina Rajadurai、Kishore V. L. Parsa、Manojit Pal
DOI:10.1039/d1cc04140a
日期:——
A Pd-catalysed regioselective synthesis of 4,5-disubstituted 7-membered N/O-heterocycles was achieved via the 7-endo-dig cyclization followed by C–C bond formation of 2-(1-alkynyl)phenylacetamide. The ligand/additive free cascade reaction proceeded in the presence of PdCl2 in aqueous MeCN when the separate and individual use of methyl vinyl ketone and allyl bromide generally afforded an O- and N-heterocycle
biologically essential pyrroloquinolinones has been developed under Cp*CoIII catalysis, which involves a cascade reaction of C(7)–H alkenylation with alkynes followed by nucleophilic addition. A wide variety of internal alkynes including enyne, diyne, and ynamide and more challenging terminalalkynes were successfully employed for the annulation in good to excellent yield with high regioselectivity.
PdCl2-catalyzed synthesis of a new class of isocoumarin derivatives containing aminosulfonyl / aminocarboxamide moiety: First identification of a isocoumarin based PDE4 inhibitor
作者:B. Thirupataiah、Guntipally Mounika、Gangireddy Sujeevan Reddy、Jetta Sandeep Kumar、Kazi Amirul Hossain、Raghavender Medishetti、Snigdha Samarpita、Mahaboobkhan Rasool、Jayesh Mudgal、Jessy E. Mathew、Gautham G. Shenoy、C. Mallikarjuna Rao、Kiranam Chatti、Kishore V.L. Parsa、Manojit Pal
DOI:10.1016/j.ejmech.2021.113514
日期:2021.10
While anti-inflammatory properties of isocoumarins are known their PDE4 inhibitory potential was not explored previously. In our effort the non-PDE4 inhibitor isocoumarins were transformed into the promising inhibitors via introducing an aminosulfonyl/aminocarboxamide moiety to the C-3 benzene ring attached to the isocoumarin framework. This new class of isocoumarins were synthesized via a PdCl2-catalyzed
Copper Nitrate Mediated Regio- and Stereoselective Difunctionalization of Alkynes: A Direct Approach to α-Chloro-β-nitroolefins
作者:Mingchun Gao、Bin Xu
DOI:10.1021/acs.orglett.6b02464
日期:2016.9.16
An efficient copper nitrate mediated chloronitration reaction was developed for the direct synthesis of α-chloro-β-nitroolefins with high regio- and stereoselectivity from simple alkynes and low toxic stannous chloride. This protocol provides a direct access to polysubstituted alkenes with operational simplicity, good functional group tolerance, and a wide substrate scope. Various applications of given
Synthesis and cytotoxic evaluation of novel indenoisoquinoline-substituted triazole hybrids
作者:Tham Pham Thi、Thuy Giang Le Nhat、Thuong Ngo Hanh、Tan Luc Quang、Chinh Pham The、Tuyet Anh Dang Thi、Ha Thanh Nguyen、Thu Ha Nguyen、Phuong Hoang Thi、Tuyen Van Nguyen
DOI:10.1016/j.bmcl.2016.05.092
日期:2016.8
The synthesis of various substituted triazole–indenoisoquinoline hybrids was performed based on a CuI-catalyzed 1,3-cycloaddition between propargyl-substituted derivatives and the azide-containing indenoisoquinoline. Besides, a variety of N-(alkyl)propargylindenoisoquinolines was used as substrates for the construction of triazole–indenoisoquinoline–AZT conjugated via a click chemistry-mediated coupling