An Excellent Nickel Boride Catalyst for the Selective Hydrogenation of Olefins
作者:Jaesung Choi、Nung Min Yoon
DOI:10.1055/s-1996-4272
日期:1996.5
Nickel boride prepared on borohydride exchange resin (BER) in methanol is an excellent catalyst for the selective hydrogenation of olefins. Thus, monosubstituted olefins and norbornene were hydrogenated quantitatively at 0°C in 1 hour in the presence of disubstituted olefins and trisubstituted α,β-unsaturated acid derivatives, the disubstituted olefins in turn were hydrogenated at 65°C in 1 hour without affecting trisubstituted olefins, benzene, and heteroaromatic compounds
Electrophilic Additions to Ethylidenenorbornene and Vinylnorbornene
作者:T. C. Shields
DOI:10.1139/v71-188
日期:1971.4.1
Electrophilic and free radical additions to 5-ethylidenebicyclo[2.2.1]hept-2-ene and 5-vinylbicyclo-[2.2.1]hept-2-ene have been carried out with peracetic acid, hydrogen chloride, and methanol. In contrast to chlorosulfonyl isocyanate, peracetic acid primarily attacks the exocyclic double bond in 5-ethylidenebicyclo[2.2.1]hept-2-ene. Several other electrophilic additions are discussed which demonstrate
The dye-sensitized photooxygenation of 2-ethylidenebicyclo[2.2.1]hept-5-ene
作者:W.R. Adams、D.J. Trecker
DOI:10.1016/0040-4020(72)80072-3
日期:1972.1
2-ethylidenebicyclo[2.2.1]hept-5-ene (1). Reduction of the resulting allylic hydroperoxides provided the epimeric 2-hydroxy-2-vinylbicyclo[2.2.1]hept-5-enes (2 and 3) and 2-(1-hydroxyethyl)bicyclo[2.2.1]hept-2,5-diene (4), the relative yields of which were apparently controlled by steric factors. Also isolated were two novel multicyclic ketones, 5 and 6, derived from thermalrearrangements of the primary
ACID-DECOMPOSABLE ESTER COMPOUND SUITABLE FOR USE IN RESIST MATERIAL
申请人:——
公开号:US20020115874A1
公开(公告)日:2002-08-22
A novel ester compound having an exo-form 2-alkylbicyclo[2.2.1]heptan-2-yl ester as the acid-decomposable site is used as a dissolution regulator to formulate a resist composition having a high sensitivity, resolution, etching resistance and storage stability.
A resist composition comprising an exo-form 2-alkylbicyclo[2.2.1]heptan-2-yl ester compound as a dissolution regulator has a high sensitivity, resolution, etching resistance and storage stability and lends itself to micropatterning with electron beams or deep-UV rays.