Examples of 'ortho ester' in a sentence
Meaning of "ortho ester"
ortho ester: A type of organic compound containing an ester group attached to an ortho carbon atom in a benzene ring
How to use "ortho ester" in a sentence
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ortho ester
A siloxane or an ortho ester is preferably employed.
The molar proportion of base is generally about equal to that of ortho ester.
Chlorotriazines containing the ortho ester substituent are particularly preferred as capping agents.
The compatibilizer compound is typically a liquid or solid epoxy or ortho ester compound.
The ortho ester having a suitable leaving group can be prepared synthetically.
These polymers contain highly reactive cyclic ortho ester groups as substituents.
Subsequent treatment of the imino ester with an alcohol yields the corresponding ortho ester.
Ortho ester groups are substantially more reactive with carboxylic acid groups than with amine groups.
Repeat until the bottom phase is substantially free of spiro ortho ester inhibitors.
Ortho ester groups are substantially more reactive with carboxylic acids groups than with amine groups.
In one embodiment of the invention then, an ortho ester of a water-soluble polymer is provided.
A cyclic ortho ester according to any preceding claim wherein p is 1.
A capped polyphenylene ether containing ortho ester end groups of the formula wherein,.
A cyclic ortho ester according to any preceding claim wherein R4 is methylene.
Thus, the invention includes compositions prepared from certain spiro ortho ester compounds.
See also
An exemplary structure of an ortho ester comprising a suitable leaving group is provided below . wherein,.
As described above, both acyclic and cyclic forms of the ortho ester functionality are included.
In some cases, the ortho ester comprising a suitable leaving group is available commercially.
The composition of claim 15 wherein said water scavenger is an ortho ester.
A cyclic ortho ester according to any preceding claim wherein R5 is hydrogen.
Preferably the ethylenically unsaturated ortho ester monomer is of the formula ( XIV ),.
A cyclic ortho ester according to any preceding claim wherein R1 is methyl.
Another preferred ethylenically unsaturated ortho ester monomer is represented by the formula ( XV ),.
A cyclic ortho ester according to claim 1 wherein m is 0 and n is 1.
When R1 is hydrogen, formic acid will be liberated upon hydrolysis of the ortho ester polymer ( I ).
A cyclic ortho ester according to claim 3 wherein p is 1.
Most often, p will be 0 when the ortho ester ring is a 6-membered ring.
A cyclic ortho ester according to any one of claims 1 to 7 wherein R5 is methyl.
Treatment of allylic alcohol 100 with a suitable ortho ester followed by heating gives ester 101.
A bioerodible carboxylic ortho ester polymer consisting essentially of monomer repeating units of the partial formula ( I ' ) ;.
Examples 1-19 are examples of the present invention utilizing ortho ester functional PPE.
A cyclic ortho ester according to claim 8 wherein R ⁵ is methyl.
Structurally, the ortho ester comprises a " branching carbon atom . ".
The ortho ester functionality can be acyclic, i.e., lacking a ringed structure.
In addition, the ortho ester functionality can be in form of a " cyclic " or " ringed " structure.
A cyclic ortho ester according to claim 8 wherein R ⁵ is hydrogen.
A cyclic ortho ester according to claim 6 wherein R ⁴ is methylene.
A cyclic ortho ester according to claim 5 wherein R ² is methyl or phenyl.
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