Compounds of formula (I) which exhibit excellent immune suppression activity, pharmacologically acceptable salts thereof, esters thereof or other derivatives:
1
wherein R
1
and R
2
are a hydrogen atom, an amino protecting group; R
3
is a hydrogen atom, a hydroxy protecting group; R
4
is a lower alkyl group; n is an integer from 1 to 6; X is an ethylene group; Y is a C
1
-C
10
alkylene group, a C
1
-C
10
alkylene group substituted with 1 to 3 substituents selected from substituent group a and b; R
5
is an aryl group; R
6
and R
7
are a hydrogen atom, a group selected from substituent group a; with the proviso when R
5
is a hydrogen atom, Y is not a single bond or a straight chain C
1
-C
10
alkylene group.
Internal release agent, composition including internal release agent, and process for producing a plastic lens using same composition
申请人:MITSUI CHEMICALS, INC.
公开号:US10239239B2
公开(公告)日:2019-03-26
An internal release agent includes at least one phosphodiester represented by the following general formula (1).
In the formula, R1 and R2 independently represent a hydrocarbon group having 1 to 30 carbon atoms, which is optionally substituted with at least one hydroxyl group, and R3 represents an alkylene group having 2 to 4 carbon atoms. A plurality of R3's may be the same as or different from each other. M represents a hydrogen atom, an ammonium ion, an alkali metal ion, or a monovalent/divalent alkali earth metal ion, and n is an integer of 1 to 60.
Polymerizable composition, optical material comprising the composition and method for producing the material
申请人:——
公开号:US20040254258A1
公开(公告)日:2004-12-16
A cured matter obtained by polymerizing and curing a polymerizable composition comprising a compound having at least one episulfide in a molecule is reduced in an odor by adding a perfume to the polymerizable composition comprising the compound having at least one episulfide in a molecule.
A cloudiness of the lens is removed by raising a purity of sulfur to 98% or more.
A reduction in a chlorine content of the sulfur compound described above to 0.1% by weight or less elevates an oxidation resistance and a light fastness of the high refractive index optical material and improves a color tone thereof.
An optical product having a high refractive index and a high-degree transparency is provided by subjecting the composition in advance to deaerating treatment at 0 to 100° C. for one minute to 24 hours under a reduced pressure of 0.001 to 50 torr.
Amino alcohol derivatives or phosphonic acid derivatives and pharmaceutical compositions containing these
申请人:Nishi Takahide
公开号:US20050043386A1
公开(公告)日:2005-02-24
Amino alcohol compounds and phosphonic acid compounds having excellent immunosuppressive activity, pharmacologically acceptable salts thereof and pharmacologically acceptable esters thereof, and pharmaceutical compositions comprising such compounds, the compounds having the following formula:
wherein R
1
and R
2
each represent hydrogen, or a protecting group of the amino group; R
3
represents hydrogen, or a protecting group of the hydroxyl group; R
4
represents a lower alkyl group; n is 1 to 6; X represents oxygen or nitrogen, which is unsubstituted or substituted with a lower alkyl group; Y represents ethylene; Z represents a C
1
-C
10
alkylene; R
5
represents an aryl group; and R
6
and R
7
each represents hydrogen; provided that when R
5
represents hydrogen, then Z represents a group other than a single bond or a straight chain C
1
-C
10
alkylene group.
Episulfide compound and process for producing the same
申请人:——
公开号:US20030149231A1
公开(公告)日:2003-08-07
The episulfide compound of the present invention has, in one molecule, one or more epithio structures represented by the following Formula 1:
1
wherein R
1
is C
1
-C
10
hydrocarbylene group; R
2
, R
3
and R
4
are each independently C
1
-C
10
hydrocarbyl group or hydrogen; Y is S, O, Se or Te; n is an integer of from 0 to 5; and m is 0 or 1, and further characterized by having a nitrogen content of 5000 ppm or less. The optical material produced by curing the episulfide compound by polymerization has a high refractive index and a large Abbe's number with little coloring and haze. The optical material is useful, particularly, as spectacle plastic lenses.