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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共26条记录   Synthesis of sulfonyl flosulide [作者：Black, WC; Guay, B,期刊：Synthesis, 页码：1101-1103 , 文章类型： Article，,卷期：1998年-8] The sulfone analogue of the selective cyclooxygenase-2 inhibitor flosulide (1) has been prepared in an eight step synthesis. A key step involves a thiol conjugate addition reaction followed by nucleophilic aromatic subst... Synthesis of (isoxazol-4-ylmethyl)triphenylphosphonium salts derived from 5-alkyl- and 5-aryl-3-methylisoxazoles [作者：Maestro, A; Banez, JM; Lopez, JA; Romero-Avila, MC,期刊：Synthesis, 页码：1104-1106 , 文章类型： Article，,卷期：1998年-8] The synthesis of (isoxazol-4-ylmethyl) triphenylphosphonium salts derived from 5-alkyl- and 5-aryl-3-methylisoxazoles has been carried out. This method involves the preparation of several 4-(chloromethyl)isoxazoles which... Synthesis of 3,7-disubstituted 10-methylphenothiazines [作者：Ebdrup, S,期刊：Synthesis, 页码：1107-1109 , 文章类型： Article，,卷期：1998年-8] Lithiation at the C-3 and C-7 positions of N-methylphenothiazine (1) can be achieved by halogen metal exchange reaction starting from 3,7-dibromo-10-methylphenothiazine (2). Reaction of the lithiated species with carbon,... Synthesis of optically active 3-hydroxy-1,5-benzodiazepin-2-ones by ring transformation of glycidates [作者：Woydowski, K; Liebscher, J,期刊：Synthesis, 页码：1110-1112 , 文章类型： Article，,卷期：1998年-8] The reaction of enantiomerically pure aliphatic glycidates 8 and 11 with o-phenylenediamines 9 gives access to optically active 3-hydroxy-1,5-benzodiazepin-2-ones 10 and 12 by ring transformation. So far the formation of... Convenient and simplified approaches to N-monoprotected triaminopropane derivatives: Key intermediates for bifunctional chelating agent synthesis [作者：Benoist, E; Loussouarn, A; Remaud, P; Chatal, JF; Gestin, JF,期刊：Synthesis, 页码：1113-1118 , 文章类型： Article，,卷期：1998年-8] High yields of selectively N-protected-1,2,3-triaminopropanes (1,3 or 1,2 functionalized diamines) were obtained in 6 or 4 steps from diamino alcohols or aminodiols, respectively. These two multi-step procedures involve ... Synthesis of functionalized triphenylenes by selective ether cleavage with B-bromocatecholborane [作者：Kumar, S; Manickam, M,期刊：Synthesis, 页码：1119-1122 , 文章类型： Article，,卷期：1998年-8] This paper presents an efficient synthetic procedure for the preparation of mono-, di- and trifunctionalized triphenylene derivatives starting from the readily available hexakis(pentyl oxy)triphenylene by selective ether... Synthetic studies involving bridgehead alpha,beta-unsaturated ketones: Protocols for regiocontrolled alpha-methylation [作者：Paquette, LA; Wang, HL; Su, Z,期刊：Synthesis, 页码：1123-1128 , 文章类型： Article，,卷期：1998年-8] Bicyclo[5.3.1]undec-10-en-9-one (3) has been converted via two routes into the 10-methyl homolog 11. The first pathway consists of alpha-phenylthiomethylation and subsequent desulfurization with Raney nickel. The second ... Conjugate addition of amidoalkyl zinc-copper reagents to a propyne iminium triflate [作者：Reisser, M; Maas, G,期刊：Synthesis, 页码：1129-1132 , 文章类型： Article，,卷期：1998年-8] Zinc-copper reagents of the type IZnCu(CN)-(CH2)(n)-(NRR2)-R-1, obtained from N-(2-iodoethyl)phthalimide, N-(2-iodopropyl)phthalimide, and N-(2-iodoethyl)benzamide, undergo conjugate addition to propyne iminium triflate ... The use of Nafion (R)-H to promote epoxide cyclizations [作者：Taylor, SK; Dickinson, MG; May, SA; Pickering, DA; Sadek, PC,期刊：Synthesis, 页码：1133-1136 , 文章类型： Article，,卷期：1998年-8] Nafion(R)-H is shown to be an effective promoter of epoxide cyclizations to aromatic positions. The reactions can be done by passing a solution of the epoxide through a column packed with Nafion(R)-H, or by stirring a mi... Selenium and tellurium chalcogenides as mild and efficient reducing agents for alpha-halo ketones [作者：Schultz, EKV; Harpp, DN,期刊：Synthesis, 页码：1137-1140 , 文章类型： Article，,卷期：1998年-8] Bis(triphenylstannyl) selenide (2) and bis(terr-butyldimethylsilyl) telluride (3) are two new reagents which in the presence of fluoride ion and under mild conditions, effectively promote the dehalogenation of alpha-halo... Practical asymmetric synthesis of both enantiomers of 6-(hydroxymethyl)piperidin-2-one [作者：Hodgkinson, TJ; Shipman, M,期刊：Synthesis, 页码：1141-1144 , 文章类型： Article，,卷期：1998年-8] A practical asymmetric synthesis of both enantiomers of 6-(hydroxymethyl)piperidin-2-one 1 is described. Asymmetric dihydroxylation (AD) of alkenyl ester 2 using the (DHQ)(2)AQN ligand provides diol (5S)-3 in greater tha... Rapid conversion of phenols to p-benzoquinones under acidic conditions with lead dioxide [作者：Omura, K,期刊：Synthesis, 页码：1145-1148 , 文章类型： Article，,卷期：1998年-8] Treatment of 4-unsubstituted and 4-halogenated phenols with PbO2 aad 70% HClO4 in AcOH afforded the corresponding p-benzoquinones in fair to high yields. The oxidation of 4-substituted 2,6-di-tert-butylphenols 6 with PbO... Synthesis of 5-oxatrienes: Useful intermediates for the preparation of hexahydrobenzofuran structures by intramolecular Diels-Alder reaction [作者：Deagostino, A; Prandi, C; Venturello, P,期刊：Synthesis, 页码：1149-1152 , 文章类型： Article，,卷期：1998年-8] The metalation with the Schlosser's base LICKOR (alkyllithium potassium alcoholate) at the gamma terminus, selectively induces 1,4-elimination reaction in cyclic alpha,beta-unsaturated acetals, and in this way hydroxy-fu... Diels-Alder trapping of ortho-quinone methides. A new entry to substituted xanthene-1,4-diones [作者：Giraud, L; Giraud, A,期刊：Synthesis, 页码：1153-1160 , 文章类型： Article，,卷期：1998年-8] Highly regioselective Diels-Alder reactions of a non-protected beta-hydroxy quinone have been achieved after formation of chelated lithium alkoxides. In this report, we demonstrate on a model system, that the selectivity... Application of erythro-2-amino-1,2-diphenylethanol as a highly efficient chiral auxiliary. Highly stereoselective Staudinger-type beta-lactam synthesis using a 2-chloro-1-methylpyridinium salt as the dehydrating agent [作者：Matsui, S; Hashimoto, Y; Saigo, K,期刊：Synthesis, 页码：1161-1166 , 文章类型： Article，,卷期：1998年-8] The Staudinger-type reaction of carboxylic acids with imines, using a 2-chloro-1-methylpyridinium salt as the dehydrating reagent, proceeded smoothly under mild conditions to afford the desired beta-lactams in high yield... Synthesis and characterization of new C-alpha,C-alpha-disubstituted (diarylaminomethyl)phosphonates [作者：Cristau, HJ; Lambert, JM; Pirat, JL,期刊：Synthesis, 页码：1167-1170 , 文章类型： Article，,卷期：1998年-8] A convenient and efficient three-step procedure for the preparation of N-protected or unprotected C-alpha,C-alpha-disubstituted (diarylaminomethyl)phosphonates 1 is reported. This method allows diversification of the sub...