Excellent stereocontrol in intramolecular Buchner cyclisations and subsequent cycloadditions; stereospecific construction of polycyclic systems
作者:Anita R. Maguire、N. Rachael Buckley、Patrick O'Leary、George Ferguson
DOI:10.1039/cc9960002595
日期:——
Highly diastereoselective rhodium(II) acetate-catalysed intramolecular addition of α-diazo ketones to aromatic rings to form the azulenones 3 has been achieved; the norcaradiene form of 3 undergoes efficient stereospecific cycloaddition with phenyltriazolinedione, in either a stepwise or a tandem process, leading to the pentacyclic systems 4 as a single diastereomer in each case.
5-Deoxy-5-alkyl-1,2-O-isopropylidene-α-D-xylofuranoses as chiral auxiliaries in asymmetric 1,4-addition reaction
作者:Yung-Son Hon、Fen-Ling Chen、Yih-Pyng Huang、Ta-Jung Lu
DOI:10.1016/s0957-4166(00)82200-4
日期:1991.1
Two deoxy-sugar based chiral auxiliaries (2 and 5) have been prepared. Their alpha,beta-unsaturated esters were treated with different cuprate reagents to give the 1,4-addition adducts in good chemical yield and good diastereoselectivity.
US4299911A
申请人:——
公开号:US4299911A
公开(公告)日:1981-11-10
Maguire, Anita R.; Buckley, N. Rachael; O'Leary, Patrick, Journal of the Chemical Society. Perkin transactions I, 1998, # 24, p. 4077 - 4091
作者:Maguire, Anita R.、Buckley, N. Rachael、O'Leary, Patrick、Ferguson, George