WebApr 1, 2000 · Abstract Alcohols and Phenols are protected efficiently with dihydropyran (DHP) in the presence of catalytic amounts of zirconium tetrachloride in dichloromethane. Deprotection of THP-ethers is... http://ion.chem.usu.edu/~tchang/Chem7300/Carbohydrate/Chapter%203%20Protecting%20Groups.pdf
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WebDisclosed is a method for producing a tetrahydropyran compound represented by general formula (5) shown in the scheme. Accordingly, a tetrahydropyran derivative is obtained in high yield and with high selectivity without using a highly toxic reagent, and an industrially useful method for producing a tetrahydropyran derivative and an intermediate thereof … Web3,4-Dihydro-2H-pyran can be used as a reactant to synthesize: Tetrahydropyranylated product from alcohols in the presence of phenolsulfonic acid-formaldehyde resin catalyst [ 1]. Tetrahydropyran derivatives by reacting pyrazoles in the presence of trifluoroacetic acid [ … teams 参加
Alcohols, reaction with dihydropyran - Big Chemical Encyclopedia
WebThe present invention relates to novel compounds of the general formula (I) their pharmaceutically acceptable salts, pharmaceutically acceptable solvates, enantiomers, diastereomers and polymorphs. The invention also relates to processes for the preparation of the compounds of invention, pharmaceutical compositions containing the compounds … WebApr 4, 2000 · In this paper we present the protection of hydroxy compounds as THP ethers and removal of the protective group over sulphuric ac id adsorbed on silica gel in aprotic (CH2Cb) and protic (MeOH) solvents, respectively. ... An Efficient Catalyst for the Protection and Deprotection of Alcohols with Dihydropyran.}, author={Majid M. Heravi … WebMar 5, 2024 · Orthogonal protection is a strategy allowing the deprotection of multiple protective groups one at a time each with a dedicated set of reaction conditions without … spaetzle press from germany