Synthetic studies towards Leinamycin. A concise synthesis of the spiro-fused 1,3-Dioxo-1,2-dithiolane moiety.
作者:Gerald Pattenden、Anthony J. Shuker
DOI:10.1016/0040-4039(91)80239-3
日期:1991.11
A synthesis of the 1,3-dioxo-1,2-dithiolabne residue (2) found in the antitumour antibiotic substance leinamycin (1) is described which features: (i) elaboration of the thiolactone (5), followed by (ii) ring opening to the thioacid (9) using H2S-Et3N and (iii) ring closure of (9) to (4) in the presence of aq. FeCl3, and finally (iv) oxidation (Scheme 1). 30071991
Method for producing polydienes and polydiene copolymers with reduced cold flow
申请人:BRIDGESTONE CORPORATION
公开号:US10301397B2
公开(公告)日:2019-05-28
A method for preparing a coupled polymer, the method comprising the steps of (i) polymerizing monomers to form a reactive polymer, and (ii) reacting the reactive polymer with a glycidic ester.