The Synthesis of Multifunctionalized 1,3-Oxazin-4-ones from Donor–Acceptor Cyclopropanes
作者:Robert J. Smith、Daniel A. Mills、Duong Nhu、Eng Wui Tan、Nigel T. Lucas、Bill C. Hawkins
DOI:10.1021/acs.joc.6b00112
日期:2016.3.4
A series of electronically diverse imines were found to readily react with various donor–acceptor cyclopropyl acid chlorides, with complete regioselectivity, to form 1,3-oxazin-4-ones in moderate yields (25–48% over two steps). Select oxazinones underwent a base induced rearrangement to afford the corresponding cycloheptene-fused oxazinones in good yields (up to 70%).
Dihydrofuran derivates useful as aroma chemicals, and process for their preparation
申请人:QUANTUM CHEMICAL CORPORATION (a Virginia corp.)
公开号:EP0128584B1
公开(公告)日:1988-10-26
US4487946A
申请人:——
公开号:US4487946A
公开(公告)日:1984-12-11
Metal-Free Synthesis of Oxazinones and Their Reductive Ring Opening to Provide Cyclopropyl Carbinols
作者:Bill Hawkins、Alexander Craig
DOI:10.1055/s-0036-1588748
日期:——
synthesis of 1,3-oxazin-4-ones are discussed, with particular attention paid to recent developments in the field. The syntheses of amine functionalised cyclopropyl carbinols via a hydride-mediated reduction of various 5-chloroethyl-1,3-oxazin-4-enones in moderate to good yield are disclosed. This new method provides an opportunity to access greater structural diversity within these useful synthetic building
Postpolymerization modification of reactive polymers derived from vinylcyclopropane. III. Polymer sequential functionalization using a combination of amines with alkoxyamines, hydrazides, isocyanates, or acyl halides
作者:Denis Hervé Seuyep Ntoukam、Gerrit Albert Luinstra、Patrick Theato
DOI:10.1002/pola.27311
日期:2014.10.1
to a double side‐chain functionalizedpolymerusing two different routes. The first route utilized hydrazide and hydroxylamine derivatives leading to a ketone conversion of 25 to 85%. In the second route, the ketone moiety was first reduced to alcohol (reduction conversion up to 100%) and then converted into the corresponding ester or urethane usingacylhalides or isocyanates, respectively, with a