Development of an Enzyme-Linked Immunosorbent Assay for the Determination of the Linear Alkylbenzene Sulfonates and Long-Chain Sulfophenyl Carboxylates Using Antibodies Generated by Pseudoheterologous Immunization
Cyclization of 5-hexenyl radicals from nitroxyl radical additions to 4-pentenylketenes and from the acyloin reaction
作者:Huda Henry-Riyad、Thomas T Tidwell
DOI:10.1139/v03-076
日期:2003.6.1
Photochemical Wolff rearrangements were used to form 5-substituted-4-pentenylketenes 1a1d (RCH=CHCH2XCH2CH=C=O: 1a R = H, X = CH2; 1b R = Ph, X = CH2; 1c R = c-Pr, X = CH2; 1d R = H, X = O), which...
光化学沃尔夫重排用于形成 5-取代-4-戊烯基烯酮 1a??1d (RCH=CHCH2XCH2CH=C=O: 1a R = H, X = CH2; 1b R = Ph, X = CH2; 1c R = c- Pr, X = CH2; 1d R = H, X = O), 其中...
Stereochemistry of the Wittig reaction. Effect of nucleophilic groups in the phosphonium ylide
作者:Bruce E. Maryanoff、Allen B. Reitz、Barbara A. Duhl-Emswiler
DOI:10.1021/ja00287a040
日期:1985.1
Les groupes anioniques et nucleophiles sur la chaine laterale des ylures de triphenylphosphonium provoquent un deplacement de la stereochimie de l'alcene obtenu vers l'isomere trans dans les reactions avec des aldehydes. L'effet est souvent plus important avec des aldehydes aromatiques qu'avec des aldehydes aliphatiques. Les substituants etudies sont les groupes oxydo, carboxylate, amino et amido
Les groupes anioniques et nucleophiles sur la chainelaterale desylures de triphenylphosphonium provoquent un deplacement de lastereochimie de l'alcene obtenu vers l'isomere trans dans les 反应 avec des 醛。L'effet est souvent 加上重要的 avec des aldehydes aromatiques qu'avec des aldehydes aliphatiques。氧、羧酸、氨基和酰胺基的取代基研究
allylic C−C σ‐bond cleavage of simple olefins to give valuable cinnamyl aldehydes is reported. 1,2‐Aryl or alkyl migration through allylic C−C bond cleavage occurs in this transformation, which is assisted by an alkyl azide reagent. This method enables O‐atom incorporation into simple unfunctionalized olefins to construct cinnamyl aldehydes. The reaction features simple hydrocarbon substrates, metal‐free
New tandem radical cyclizations directed toward the synthesis of crinipellin A
作者:C. Eric Schwartz、Dennis P. Curran
DOI:10.1021/ja00181a033
日期:1990.12
tandem radicalcyclization strategy for the construction of the congested angular triquinane portion of the naturally occurring tetraquinane crinipellin A. The preparation and cyclization of three 5,5-disubstituted-1,4-dimethyl-1,3-cyclopentadienes are detailed. This cyclization strategy results in a 1,4-functionalization of the cyclopentadiene nucleus, mediated by an allylic radicalcyclization. Each
我们描述了一种新的串联自由基环化策略,用于构建天然四喹烷 crinipellin A 的拥挤角三喹烷部分。 详细介绍了三个 5,5-二取代-1,4-二甲基-1,3-环戊二烯的制备和环化. 这种环化策略导致环戊二烯核的 1,4-官能化,由烯丙基环化介导。每次串联环化以 5:1 的比例产生两种非对映体三喹烷。次要的非对映异构体对 crinipellin A 的 D 环异丙基具有正确的相对立体化学。还描述了与自由基环化平行的串联阳离子环化