1075-20-3Relevant academic research and scientific papers
Chemoselective Deoxygenation of 2° Benzylic Alcohols through a Sequence of Formylation and B(C6F5)3-Catalyzed Reduction
Oestreich, Martin,Richter, Sven C.
supporting information, p. 2103 - 2106 (2021/07/22)
A sequence of formylation and B(C6F5)3-catalyzed reduction of the resulting formate with Et3SiH enables the chemoselective deoxygenation of secondary benzylic alcohols. Primary benzylic and tertiary non-benzylic alcohols are not reduced by this protocol. The formyl group fulfills a double role as activator and self-sacrificing protecting group. The deoxygenation of these formates is fast and can be carried out in the presence of other potentially reducible groups. Neighboring-group participation was found in the deoxygenation of certain diol motifs.
Selective lewis acid catalyzed assembly of phosphonomethyl ethers: Three-step synthesis of tenofovir
Ocampo, Charles E.,Lee, Doris,Jamison, Timothy F.
supporting information, p. 820 - 823 (2015/03/18)
Described herein is a novel Lewis acid catalyzed rearrangement-coupling of oxygen heterocycles and bis(diethylamino)chlorophosphine that provides direct formation of the phosphonomethyl ether functionality found in several important antiretroviral agents. A wide range of dioxolanes and 1,3-dioxanes may be employed, furnishing the desired products in good yield. The utility of this method is demonstrated in a novel synthesis of tenofovir, an antiretroviral drug used in the treatment of HIV/AIDS and hepatitis B.
Methylene acetal formation from 1,2- and 1,3-diols using an O, S -acetal, 1,3-dibromo-5,5-dimethylhydantoin, and BHT
Maegawa, Tomohiro,Koutani, Yasuyuki,Otake, Kazuki,Fujioka, Hiromichi
, p. 3384 - 3390 (2013/06/26)
A mild and efficient method for formation of methylene acetals from 1,2- and 1,3-diols using methoxymethylphenylsulfide, 1,3-dibromo-5,5- dimethylhydantoin (DBDMH), and dibutylhydroxytoluene (BHT) is described. The use of BHT in this process suppresses side reactions and enables high-yielding formation of methylene acetals of various diols, including carbohydrate-type substrates.
A new and more efficient synthesis of methylene acetals
Chu, Guobiao,Zhang, Yanqiao,Li, Chunbao,Zhang, Yuqing
experimental part, p. 3828 - 3832 (2010/03/03)
A new and efficient synthesis of benzyl chlorides and methylene acetals by use of 2,4-dichloro-6-methoxy[l,3,5]triazine (MeOTCT) and dimethyl sulfoxide has been developed. Chlorides are the major products for benzyl alcohols, while methylene acetals are the major products for secondary alcohols. This procedure provides the highest yields so far for methylene acetals of steroids. A plausible mechanism is proposed on the basis of the experiments. Georg Thieme Verlag Stuttgart.
Study of Oxidation of Terminal Unsaturated Compounds by Reagents Based on Dimethylsulfoxide
Krasnokutskaya,Habicher,Yusubov,Filimonov
, p. 153 - 157 (2007/10/03)
The products of reactions of styrene, phenylacelylene, and 1-bromo-1-phenylethane with HBr and Br2 in DMSO were studied for the first time by high-performance liquid chromatography and gas chromatography-mass spectrometry. Phenylglyoxal is the main product in the reactions with styrene and bromophenylethane, while dibromostyrenes are formed as the main products in the reaction with phenylacetylene. Schemes of the reactions of these substrates with the reagents are proposed. The reactions of nucleophilic addition and decomposition of the dimethylsulfoxonium salts formed are the key stages of the processes considered.
