Dual Reactivity of Methoxymethyl Benzenesulfenate in Nucleophilic Substitution
作者:Tadashi Okuyama、Takayuki Fueno
DOI:10.1246/bcsj.65.2672
日期:1992.10
from the 18O-labeled substrate showed that the bond cleavage occurs mostly between the oxygen and the proformyl carbon except for the acid-catalyzed water reaction which undergoes the S–O cleavage. A mechanism for a nucleophilic reaction at the sulfur to form a sulfurane intermediate which breaks down with the C–O cleavage is presented. The hydrolysis rate is also strongly dependent on the second order
The Crossed Claisen Ester Condensation Mediated by Titanium(IV) Bistriflate
作者:Yoo Tanabe、Teruaki Mukaiyama
DOI:10.1246/cl.1986.1813
日期:1986.11.5
The crossed Claisen ester condensation between methoxymethyl ester and methyl ester promoted by the combined use of titanium(IV) bistriflate and tertiary amine has been established.
TANABE YOO; MUKAIYAMA TERUAKI, CHEM. LETT.,(1986) N 11, 1813-1816
作者:TANABE YOO、 MUKAIYAMA TERUAKI
DOI:——
日期:——
Carbon Homologation of 1-Alkynes Using Alkoxymethyl Esters Mediated by Dichlorobis(trifluoromethanesulfonato)titanium(IV)
作者:Yoo Tanabe
DOI:10.1246/bcsj.67.3309
日期:1994.12
Various 1-alkynes were converted to 1-alkoxy-3-chloro-2-alkenes using alkoxymethyl esters and dichlorobis(trifluoromethanesulfonato)titanium(IV) [TiCl2(OTf)2, titanium(IV) bis(triflate)]. This carbon homologation proceeded in the case of not only simple 1-alkynes but also for several 3- or 4-dimethylcarbamoyloxy-, 5-benzoyloxy-, 5-phenoxycarbonyloxy-, and 5-methoxycarbonyloxy-1-alkynes. Among them