Nitration of Pentamethylnitrobenzene, Pentamethylbenzoic Acid and Its Methyl Ester, Pentamethylacetanilide, and Pentamethylphenol and Its Methyl Ether. Orienting Effect of the Substituents for the Side-chain Nitrooxylation
Regioselectivity of the Base-Induced Ring Cleavage of 1-Oxygenated Derivatives of Cyclobutabenzene
作者:Abha Gokhale、Peter Schiess
DOI:10.1002/hlca.19980810207
日期:1998.2.4
products through distal and/or proximal cleavage of the strained four-memberedring via benzyl carbanion 4 and/or aryl carbanion 5. A systematic study of this process reveals the relative stability of the two isomeric carbanions 4 and 5 as a key factor in determining the course of the ring-cleavage reaction. While benzyl carbanions 4 can be trapped with carbon electrophiles, attempts at trapping aryl
Quantum Amplified Isomerization in Polymers Based on Triplet Chain Reactions
作者:Lorraine Ferrar、Mark Mis、Joseph P. Dinnocenzo、Samir Farid、Paul B. Merkel、Douglas R. Robello
DOI:10.1021/jo8007786
日期:2008.8.1
Photoinitiated triplet quantum amplified isomerizations (QAI) of substituted Dewar benzene derivatives in polymeric media are reported. The quantum efficiencies and the ultimate extents of reactant-to-product conversions increase significantly with the incorporation of appropriate co-sensitizers; compounds whose triplet energies are similar to or lower than that of the sensitizer and close to that
Thermal addition reactions to benzocyclobutenones studied by flash photolysis
作者:P. Schiess、M. Eberle、M. Huys-Francotte、J. Wirz
DOI:10.1016/s0040-4039(01)80210-0
日期:1984.1
Ortho-quinoid vinylketenes 2 have been generated through flashphotolysis of benzocyclobutenones 1. A kinetic study of intermolecular addition reactions of 2 competing with the recyclization 2 → 1 reveals strikingly different substituent effects for the addition of methanol and of dienophiles.
Process for the preparation of pyrazolo[1,5-a]-1,3,5-triazines and intermediates thereof
申请人:Sherbine P. James
公开号:US20070161790A1
公开(公告)日:2007-07-12
The present invention provides novel processes and intermediates for preparing corticotropin releasing factor (CRF) receptor antagonists having the structure below which are useful in treating CRF-related disorders such as anxiety and depression.