{[[K.18-Crown-6]Br3}n: A tribromide catalyst for the catalytic protection of amines and alcohols
作者:Gholamabbas Chehardoli、Mohammad Ali Zolfigol、Fateme Derakhshanpanah
DOI:10.1016/s1872-2067(12)60644-5
日期:2013.9
[K.18-Crown-6]Br3}n, a unique tribromide-type catalyst, was utilized for the N-boc protection of amines and trimethylsilylation (TMS) and tetrahydropyranylation (THP) of alcohols. The method is general for the preparation of N-boc derivatives of aliphatic (acyclic and cyclic) and aromatic, and primary and secondary amines and also various TMS-ethers and THP-ethers. The simple separation of the catalyst
Mild and High-Yielding Molybdenum(VI) Dichloride Dioxide-Catalyzed Formation of Mono-, Di-, Tri-, and Tetracarbamates from Alcohols and Aromatic or Aliphatic Isocyanates
作者:Christian Stock、Reinhard Brückner
DOI:10.1002/adsc.201200303
日期:2012.8.13
to completion when 1 mol% of the catalyst was employed. Diols, triols, and tetraols reacted with monoisocyanates likewise, as did monofunctional alcohols and diisocyanates. These pairings furnished di-, tri-, tetra-, and dicarbamates, respectively. Reactants, which were poorly soluble in CH2Cl2 at room temperature required elevating the temperature and possibly choosing a higher-boiling solvent (ClCH2CH2Cl
RADIATION-SENSITIVE RESIN COMPOSITION, METHOD FOR FORMING A RESIST PATTERN, COMPOUND, AND POLYMER
申请人:ASANO Yuusuke
公开号:US20120156612A1
公开(公告)日:2012-06-21
A radiation-sensitive resin composition includes a first polymer that includes a repeating unit having an acid-labile group and becomes alkali-soluble upon dissociation of the acid-labile group, and a radiation-sensitive acid-generating agent. The acid-labile group has a structure shown by a general formula (1). R
1
represents a methyl group or the like, R
2
represents a hydrocarbon group that forms a cyclic structure, R
3
represents a fluorine atom or the like, R
4
represents a carbon atom, and n
1
is an integer from 1 to 7.
Amidate compound, catalyst for polyurethane production, and method for producing polyurethane resin
申请人:KOEI CHEMICAL COMPANY, LIMITED
公开号:US10689478B2
公开(公告)日:2020-06-23
Provided is an amidate compound represented by the formula (1):
wherein A is a substituted or unsubstituted hydrocarbon group, n is an integer of 1 or more, and D is a nitrogen-containing organic group represented by the formula (2):
wherein R1, R2, and R3 are the same or different, and are each a hydrocarbon group that may contain a heteroatom; some or all of R1, R2, and R3 may be bonded together to form a ring structure; X is a nitrogen atom, an oxygen atom, or a sulfur atom; and a is 0 or 1, wherein a is 1 when X is a nitrogen atom, and a is 0 when X is an oxygen atom or a sulfur atom.
Pattern forming method, actinic ray-sensitive or radiation-sensitive resin composition and resist film
申请人:FUJIFILM CORPORATION
公开号:US10248019B2
公开(公告)日:2019-04-02
A pattern forming, method, includes: (i) forming a film from an actinic ray-sensitive or radiation-sensitive resin composition that contains (A) a compound capable of generating an acid upon irradiation with an actinic ray or radiation and decomposing by an action of an acid to decrease a solubility of the compound (A) for an organic solvent; (ii) exposing the film; and (iii) performing development by using a developer containing an organic solvent.