127243-54-3Relevant articles and documents
Preferred conformation of C-lactose at the free and peanut lectin bound states
Ravishankar,Surolia,Vijayan,Lim, Sungtaek,Kishi, Yoshito
, p. 11297 - 11303 (1998)
A conformational analysis of methyl α-C-lactoside (5) is carried out (Table 1), which suggests the preferred solution conformation of 5 to be described as a mixture of conformers A (φ = 300°; ψ = 60°) and B (φ = 300°; ψ = 300°) to a first approximation. A
A simple and useful synthetic protocol for selective deprotection of tert-butyldimethylsilyl (TBS) ethers
Khan, Abu T.,Ghosh, Subrata,Choudhury, Lokman H.
, p. 2198 - 2204 (2007/10/03)
A wide variety of tert-butyldimethylsilyl ethers 1 can be easily cleaved to the corresponding parent hydroxyl compound 2 in the presence of 5 mol % of acetonyltriphenylphosphonium bromide (ATPB) at room temperature. In addition, tert-butyldiphenylsilyl ethers can also be cleaved by using 20 mol % of the same catalyst. Alkyl tert-butyldimethylsilyl ethers can be deprotected to the hydroxyl compounds chemoselectively in the presence of aryl tert- butyldimethylsilyl ethers. Some of the major advantages are mild reaction conditions, no aqueous workup, high efficiency and chemoselectivity and compatibility with other protecting groups; no brominations occur in the aromatic ring under these experimental conditions. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
A Highly Efficient and Chemoselective Synthetic Protocol for Tetrahydropyranylation/Depyranylation of Alcohols and Phenols
Khan, Abu T.,Mondal, Ejabul,Borah, Ballav M.,Ghosh, Subrata
, p. 4113 - 4117 (2007/10/03)
Various alcohols and phenols can be converted efficiently to the corresponding tetrahydropyranyl (THP) ethers in good yields using catalytic amounts of bromodimethylsulfonium bromide (0.005-0.02 equivalent) at room temperature. On the other hand, various THP ethers can also be deprotected to the parent alcoholic or phenolic compounds in CH2Cl2/ MeOH (5:2) by employing 0.05 equivalent of the same catalyst. Some of the major advantages of this procedure are its mild conditions, that it is highly selective and efficient, high yielding, and cost-effective, that it needs no solvent and is compatible with the presence of other protecting groups. Furthermore, no brominations occur at a double or triple bond, at an allylic position or even at an aromatic ring. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.