TRICYCLIC ORTHO ESTER FORMATION FROM TRICHLOROETHYLIDENE ACETALS OF SUGARS VIA KETENE ACETALS
Makaleler > Tam Makale · 1994
Yazarlar: Azize Yeşim SALMAN, ÖMÜR MAKİNABAKAN, LEVENT YÜCEER
TETRAHEDRON LETTERS, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 1994, cilt 35, ss 9233-9236
DOI: 10.1016/0040-4039(94)88475-7
Özet
One step formation of the tricyclic dichloroethylidyne ortho esters from the reaction of trichloroethylidene acetals of D-galactose and D-arabinose with K tert-butoxide are described. The possible intermediate, ie, ketene acetal was prepared separately, from the suitably protected 1,2-O-trichloroethylidene-alpha-D-galactofuranose Stereoselective formation of an ortho ester anhydride, from the ketene acetal is also described