Reaction of halogens with some α,β-unsaturated aldehydes and ketones
作者:Victor L. Heasley、Dale F. Shellhamer、Tom L. Carter、Daphne E. Gipe、Robert K. Gipe、Richard C. Green、John Hordeen、Terry D. Rempel、Dan H. Spaite、Gene E. Heasley
DOI:10.1016/s0040-4039(01)92934-x
日期:1981.1
Mechanisms are proposed to account for evidence indicating that some simple α,β-unsaturated aldehydes and ketones do not react with halogens by the expected attack on the CC bond.
提出了机制以解释表明某些简单的α,β-不饱和醛和酮不会因预期的对CC键的攻击而与卤素反应的证据。
Borate promoted electrophilic additions of alkyl hypohalites
作者:Gene E. Heasley、Michael Duke、Denton Hoyer、John Hunnicutt、Mason Lawrence、Martin J. Smolik、Victor L. Heasley、Dale F. Shellhamer
DOI:10.1016/s0040-4039(00)87132-4
日期:1982.1
Catalysis by trimethyl borate promotes a rapid ionic reaction of methyl hypobromite with alkenes and dienes in methylene chloride.
硼酸三甲酯的催化作用促进次溴酸甲酯与二氯甲烷中的烯烃和二烯的快速离子反应。
Reactions of carbamyl radicals: intramolecular hydrogen abstraction reactions
作者:Patrick F. Dicks、Stephen A. Glover、André Goosen、Cedric W. McCleand
DOI:10.1016/s0040-4020(01)90030-4
日期:1987.1
to intramolecularhydrogenabstraction. Methyl N-(ω-phenylalkyl) carbanyl radicals and methyl N-pentylcarbamyi radicals readily abstract hydrogen through a six membered transition state or a seven membered transition state if the hydrogen is beniylic. The selectivities are interpreted in terms of the electrophilicity of the radical and the stereo-electronic requirements of hydrogenabstraction reactions
AZT derivatives exhibiting spermicidal and anti-viral activity
申请人:Parker Hughes Institute
公开号:US06482805B2
公开(公告)日:2002-11-19
Contraceptive activity as well as anti-viral protection can be provided by contraceptive compositions containing a pyrimidine-based nucleoside or nucleotide exhibiting spermicidal or sperm-immobilizing activity. In one example, the active ingredient contains a thymine ring (e.g. AZT) that has 5-halo, 6-alkoxy substitution. Additional improvements in anti-HIV activity for certain AZT derivatives are seen by providing the pentose ring of AZT with aryl phosphate substitution.
Spermicidally active 5-halo-6-alkoxy-5,6-dihydro-2′,3′-dideoxy-uridines and their pharamaceutical compositions
申请人:Wayne Hughes Institute
公开号:US06191120B1
公开(公告)日:2001-02-20
Contraceptive activity as well as anti-viral protection can be provided by contraceptive compositions containing a pyrimidine-based nucleoside or nucleotide exhibiting spermicidal or sperm-immobilizing activity. In one example, the active ingredient contains a thymine ring (e.g. AZT) that has 5-halo, 6-alkoxy substitution. Additional improvements in anti-HIV activity for certain AZT derivatives are seen by providing the pentose ring of AZT with aryl phosphate substitution.