orthoester造句

• A way to improve this is to use an orthoester as a source of alcohol.
• "' Triethyl orthoacetate "'is the ethyl orthoester of acetic acid.
• To prevent the accumulation of the orthoester intermediates, the glycosylation condition should be slightly acidic.
• Usually a Lewis acid like boron trifluoride etherate is used for both, the synthesis of the orthoester and the polymerization.
• Water produced along with the acetal product is used up in hydrolysing the orthoester and producing more alcohol to be used in the reaction.
• These salts can react with an excess of alcohol to form the orthoester RC ( OR ) 3, with ammonia or an amine to form an amidine or with water to form an ester.
• The triethylorthoacetate reacts initially to the corresponding cyclic orthoester with the vicinal hydroxyl groups of the 1, 2, 6-hexanetriol, which is homopolymerized to polyorthoester type III by reaction with the 6-position hydroxyl group.
• The epoxide cyclohexene oxide and the lactone ?-butyrolactone are reacting to the spiro orthoester spiro-7-9-dioxacyclo [ 4.3 . 0 ] nonane-8, 2'1'- oxacyclo-pentane.