从醛4开始,开发了一种新的四步合成路线,用于取代2,3-苯并二氮杂1 1,具有极高的总收率。该途径包括将各种芳族格氏试剂1,2-加成4,PCC氧化和6的烯烃基的好氧Wacker型氧化,然后将所得的1,5-二羰基7与N 2 H 4缩合。。异喹诺酮9时来代替酮醛基获得。通过X射线单晶衍射分析确认了关键结构。
CuI Mediated One-Pot Cycloacetalization/Ketalization of <i>o</i>-Carbonyl Allylbenzenes: Synthesis of Benzobicyclo[3.2.1]octane Core
作者:Chieh-Kai Chan、Yu-Lin Tsai、Meng-Yang Chang
DOI:10.1021/acs.orglett.7b00630
日期:2017.4.7
in good yields. The expeditious one-step route provides a three C–O bond formation. The key products with the structural framework of a benzofused dioxabicyclo[3.2.1]octane core have been confirmed by X-ray crystallographic analysis. Synthesis of dihydroisocoumarin has been studied.
Construction of Nitrated Benzo[3.3.1]bicyclic Acetal/Ketal Core via Nitration of <i>o</i>-Carbonyl Allylbenzenes
作者:Chieh-Kai Chan、Yu-Lin Tsai、Meng-Yang Chang
DOI:10.1021/acs.orglett.7b00245
日期:2017.3.17
Intramolecular annulation of o-carbonyl allylbenzenes was achieved to construct novel nitrated [6,6,6]tricycles having an acetal or ketal motif in good yields. The expeditious one-step nitration route provides 4 or 5 new bond formations, including 2 or 3 C–N bonds and 2 C–O bonds. The structural framework of benzobicycle [3.3.1] is confirmed by X-ray crystallographic analysis. A plausible mechanism
One-pot access to 2-naphthols and benzofurans via the aerobic Wacker-type oxidation/intramolecular aldol cyclization
作者:Meng-Yang Chang、Chieh-Kai Chan、Shin-Ying Lin
DOI:10.1016/j.tet.2012.12.009
日期:2013.2
An aerobic Wacker-type oxidation/intramolecular aldol cyclization synthetic route toward two oxygenated 2-naphthols 3 and benzofurans 4 starting with skeleton 2 with good yields is described. The route has been carried by the one-pot transformation of the regioselective PdCl2/CuCl2-mediated Wacker oxidative cyclization of skeleton 2 with molecular oxygen under the alkaline methanolic condition. Skeleton 2 was prepared from skeleton 1 in moderate total yields via the known protocol. (c) 2012 Elsevier Ltd. All rights reserved.