436848-03-2Relevant academic research and scientific papers
Chemoselective O-tert-butoxycarbonylation of phenols using 6,7-dimethoxyisoquinoline as a novel organocatalyst
Saito, Yukako,Yoshimura, Yuichi,Takahata, Hiroki
experimental part, p. 6915 - 6917 (2011/03/18)
The chemoselective O-tert-butoxycarbonylation of phenols using low levels (5-0.1 mol %) of 6,7-dimeth-oxyisoquinoline as a reusable organocatalyst is described.
Triphenylphosphine as a novel organocatalyst for chemoselective O-tert-butoxycarbonylation of phenols
Chebolu, Rajesh,Chankeshwara, Sunay V.,Chakraborti, Asit K.
, p. 1448 - 1454 (2008/12/21)
A novel organocatalytic procedure for the chemoselective O-tert-butoxycarbonylation of phenols under neutral and neat conditions is described. Georg Thieme Verlag Stuttgart.
Organocatalytic methods for chemoselective O-tert-butoxycarbonylation of phenols and their regeneration from the O-t-Boc derivatives
Chankeshwara, Sunay V.,Chebolu, Rajesh,Chakraborti, Asit K.
supporting information; scheme or table, p. 8615 - 8618 (2009/04/11)
(Chemical Equation Presented) Carbon tetrabromide (CBr4) catalyzes O-tert-butoxycarbonylation of functionalized phenols without any side reactions (bromination, addition of CBr3 to a double bond, and formation of symmetrical diaryl carbonates, cyclic carbonates, or carbonic-carbonic anhydrides). The parent phenols are regenerated from the O-t-Boc derivatives by the catalyst system CBr4-PPh3 without affecting other protecting groups (aryl alkyl ether, alkyl ester, and thioacetal) or competitive side reaction such as bromination, nitrene (from NO2) and α,α-dibromoolefine (with CHO/COMe) formation, and transesterification (with CO2Me/Et) taking place.
Optically active compound and photosensitive resin composition
-
, (2008/06/13)
A photoactive compound is used in combination with a photosensitizer, represented by the following formula (1): A?[(J)m?(X-Pro)]n ??(1) wherein A represents a hydrophobic unit comprising at least one kind of hydrophobic groups selected from a hydrocarbon group and a heterocyclic group, J represents a connecting group, X-Pro represents a hydrophilic group protected by a protective group Pro which is removable by light exposure, m represents 0 or 1, and n represents an integer of not less than 1. The protective group Pro may be removable by light exposure in association with the photosensitizer (especially, a photo acid generator), or may be a hydrophobic protective group. The hydrophilic group may be a hydroxyl group or a carboxyl group. The photoactive compound has high sensitivity to a light source of short wavelength beams, for resist application, therefore, the photoactive compound is advantageously used for forming a pattern with high resolution.
