3,4,5-Tris benzoyloxy

The 4,4, 4"-tris(benzoyloxy)trityl group has been used to protect the 2unino functions of the bases in deoxyribonucleosides,... 

Tris(benzoyloxy)trityl bromide selectively protects the primary hydroxy group in nucleosides. It is more stable than trityl under acid conditions, but is base-labile. It was applied to the synthesis of 3 -substituted thymidines carrying 3 -acid-... 

Sekine, M., Masuda, N and Hata, T. (1986) Synthesis of oligodeoxyribo-nucleotides involving a rapid procedure for removal of base-protecting groups by use of the 4,4, 4 -tris(benzoyloxy)trityl (TBTr) group. Bull, Chem, Soc Jpn 59, 1781-1789. 

Carboxy-melhyl)-2-tri(Uior[Pg.758]

Similar reaction of l-O-acetyl-2,3,5-tri-0-benzoyl-/ -D-ribose (36) on a small scale and in a cooled reactor gave the product of direct substitution, namely, l-0-acetyl-2,3,5-tri-0-benzoyl-4-bromo-/ -D-ribose (37), but, on a larger scale, or without cooling, an equilibrated mixture of the ribo and the l-lyxo bromides (37 and 38) was produced (see Scheme 8). The former, with the benzoyloxy group at C-3 and the bromine atom m-related, was readily... 

TABLE 3. Polymorphism of (a) 2,3-naphthylene-bis-(4-alkoxybenzoates) and (b) l,2,3-tris[4-(4-alkoxybenzylideneamino)benzoyloxy]benzoates... 

In the case of tri-O-benzyl-D-glucal, entirely different chemistry is observed, with the initially formed cation 102 abstracting a hydride ion from the 0-6 benzyl group to give the 3-deoxy species 103. Intramolecular addition to C-2 affords 104 and the initially cleaved benzoyloxy group adds to C-l to give the unusual bicyclic 105 in 45% yield (Scheme 12).120... 

Bodea and Farca an prepared acetoxy, benzoyloxy, and methoxy derivatives from tri- and tetrachloro-3-hydroxyphenothiazine. Reduction of phenothiazone followed by a treatment with dimethyl sulfate led to 3-methoxyphenothiazine. The synthesis of some 0-glucosides from halogenated 3-hydroxyphenothiazines has been performed recently. ... 

Tris-[cyclopropancarbonyloxy]-boran 92% Tris-[2,4,6-trimethyl-benzoyloxy]-boran 91%... 

Die lsolierung der Triacyloxy-borane ist aus Griinden der leichten Dismutation problematisch und nur im Falle von Tris-[2,4,6-trimethyl-benzoyloxy]- und Tris-[2,2-dimethyl-propanoyloxy]-boran ohne Zers. mog-lich. 

Tri-Ac, 1-benzoyl 6P, P,9oi-Triacetoxy- oL-benzoyloxy-4P-hy droxy dihydro-P-agarofuran... 

Benzammo-ohmazo1on-(4) 26, 464. 5-Benzoyloxy-l-pheiiy. 1.2.3-4riiazoi 26,103. l-Fbenyl-2(oder 4)-beii2pyl-1.2.4-tri<... 

Xitrat des Caryophyllenhydrate 6, 105. Tri thyl-rd-benzoyloxy-athyll-ainmoniam bydroxyd 9 II 151. ... 

---