[EN] EFFICIENT PRODUCTION OF HETEROLOGOUS PROTEINS USING MANNOSYL TRANSFERASE INHIBITORS [FR] PRODUCTION EFFICACE DE PROTÉINES HÉTÉROLOGUES À L'AIDE D'INHIBITEURS DE LA MANNOSYL TRANSFÉRASE
reactions, does not require strong electrophilicactivators, engages a broad range of C(sp3)‐, C(sp2)‐, and C(sp)‐nucleophiles, and seamlessly integrates with C−H and C−X magnesiation. Given the central character of sulfur compounds in organic chemistry, this protocol allows access to unrelated carbonyls, olefins, organometallics, halides, and boronic esters through a single strategy.
By using 4–10 mol% Fe(III) oxo acetate catalyst, prepared by solid state atmospheric oxidation of Fe(II) acetate, in combination with triethylsilane and chlorotrimethylsilane, hydrosilylation of benzylic carbonyl compounds with subsequent chlorination is achieved within a few hours at room temperature. This new method is mild and rapid compared to the conventional two step approach involving reduction
A heterocyclic compound useful as an antiallergic agent is provided.
A compound represented by the following formula (1) or a salt thereof:
wherein the ring A is a homocyclic or heterocyclic ring; the ring B is a heterocyclic ring which contains G and nitrogen atom N as constituent atoms thereof, wherein G is CH or N; R
1
is a carbonyl group or an alkylene group; R
2a
and R
2b
are an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group; X is an oxygen atom or a sulfur atom; Z is a hydroxyl group, an alkoxy group, a cycloalkyloxy group, an aryloxy group, an aralkyloxy group, an amino group, or an N-substituted amino group; and n is 0 or 1; with the proviso that when the ring A is a benzene ring or when the ring B is a piperazine ring, R
1
is an alkylene group which may have a substituent.
Substituent effects in saturated systems. Conformationally transmitted retardation of the rates of solvolysis of substituted cyclohexyl-phenylmethyl chlorides
作者:J. P. Coleman、F. I. Shah-Malak、J. H. P. Utley
DOI:10.1039/j29700000666
日期:——
Rate coefficients at several temperatures have been measured for the solvolysis in aqueous acetone of the methyl chlorides p-RC6H4·CHCl·C6H11 and trans-4-RC6H10·CHClPh where R = H, Me, and But. The products of solvolysis of cyclohexyl-p-tolylmethyl chloride have been identified and their relative proportions determined.
已测量了在几个温度下丙酮溶液中氯甲烷p -RC 6 H 4 ·CHCl·C 6 H 11和反式-4-RC 6 H 10 ·CHClPh在丙酮水溶液中的溶剂分解速率系数,其中R = H,Me和卜牛逼。已经鉴定了环己基-对甲苯基甲基氯的溶剂分解产物,并确定了它们的相对比例。
Inter- and Innermolecular Reactions of Chloro(phenyl)carbene
作者:Murray G. Rosenberg、Udo H. Brinker
DOI:10.1021/jo026521h
日期:2003.6.1
Supramolecular photolyses of 3-chloro-3-phenyl-3H-diazirine (8) were performed within cyclodextrin (CyD) hosts to determine whether these toroidal inclusion compounds could alter the reactivity of the ensuing carbene reaction intermediate, chloro(phenyl)carbene (9). Remarkably, no intramolecular products stemming from carbene 9 could be detected. Instead, modified CyDs were formed via so-called innermolecular