Isomerizations of Propargyl 3-Acylpropiolates via Reactive Allenes
作者:Yuanxian Wang、Thomas R. Hoye
DOI:10.1021/acs.orglett.8b01705
日期:2018.8.3
Thermal isomerizations of various propargyl 3-acylpropiolates are described. Many result in the formation of 3-acylbutenolides. These reactions appear to proceed through intermediate 2,3-dehydropyrans (strained cyclic allenes), which then isomerize in a previously unobserved fashion. Competitive processes that provide additional mechanistic insights are also described.
Studies of vitamin D (calciferol) and its analogs. 34. Potential inhibitors of vitamin D metabolism: an oxa analog of vitamin D
作者:Sheri A. Barrack、Richard A. Gibbs、William H. Okamura
DOI:10.1021/jo00243a035
日期:1988.4
BARRACK, SHERI A.;GIBBS, RICHARD A.;OKAMURA, WILLIAM H., J. ORG. CHEM., 53,(1988) N 8, 1790-1796
作者:BARRACK, SHERI A.、GIBBS, RICHARD A.、OKAMURA, WILLIAM H.
DOI:——
日期:——
BILINSKI VANDA; KARPF MARTIN; DREIDING ANDRE S., HELV. CHIM. ACTA, 69,(1986) N 7, 1734-1741
作者:BILINSKI VANDA、 KARPF MARTIN、 DREIDING ANDRE S.
DOI:——
日期:——
Synthesis of benzo-fused lactams and lactones via Ru(<scp>ii</scp>)-catalyzed cycloaddition of amide- and ester-tethered α,ω-diynes with terminal alkynes: electronic directing effect of internal conjugated carbonyl group
In the presence of a catalytic amount of Cp*RuCl(cod), 1,6- and 1,7-diynes connected by an amide or an ester tether underwent cycloaddition with terminal alkynes at room temperature to give rise to cycloadducts in 40â93% yields with 63 : 37â83 : 17 regioisomer ratios.