نتایج جستجو برای: alkb
تعداد نتایج: 309 فیلتر نتایج به سال:
A series of 5H-thiazolo[3,2-a]pyrimidin-5-ones were synthesized by the cyclization reactions of S-alkylated derivatives in concentrated H₂SO₄. Upon treatment of S-alkylated derivatives at different temperatures, intramolecular cyclization to 7-(substituted phenylamino)-5H-thiazolo[3,2-a]pyrimidin-5-ones or sulfonation of cyclized products to sulfonic acid derivatives occurred. The structures of...
A Pd/C/Zn mixture with alcohols has been revealed to be an efficient transfer hydrogenation system to quinolines. Furthermore, the metals mixture is able to activate alcohols as N-alkylating agents in a hydrogen autotransfer process. 1,2,3,4-Tetrahydroquinolines and N-alkylated tetrahydroquinolines from quinolines have been obtained with excellent yields in one step.
A direct oxidative cross-dehydrogenative coupling (CDC) of N-aryl tetrahydroisoquinolins with 5H-oxazol-4-ones catalyzed by CuBr using air as the only oxidant has been developed, which could also proceed smoothly under a metal-free oxidative system with PhI(OAc)2 as the oxidant. A series of alkylated tetrahydroisoquinolin derivatives were obtained in good yields and excellent diastereoselectivi...
N-Substituted amides and lactams are rapidly N-alkylated under solvent-free phase-transfer catalytic conditions using microwaves.
Autism spectrum disorder (ASD) is a complex developmental syndrome of unknown etiology. Recent studies employing exome- and genome-wide sequencing have identified nine high-confidence ASD (hcASD) genes. Working from the hypothesis that ASD-associated mutations in these biologically pleiotropic genes will disrupt intersecting developmental processes to contribute to a common phenotype, we have a...
Cyclopentadienyl nickel com plexes [(C 5 H 2rBu3 -l,2 ,4)N i(M -C O ) ] 2 (1) and [(C 5 H/Pr4 )N i(//-C O ) ] 2 (2) have been synthesized from nickel tetracarbonyl and the corre sponding lithium cyclopentadienide, and [(C 5 /Pr5 )N i(//-C O ) ] 2 (3) has been obtained in high yield from nickel tetracarbonyl and the free pentaisopropylcyclopentadienyl radical. The crystal structure o f 1 shows ...
2-Ethyhexyl nitrate (2-EHN) is a synthetic chemical used as a diesel fuel additive, which is recalcitrant to biodegradation. In this study, the enzymes involved in 2-EHN degradation were investigated in Mycobacterium austroafricanum IFP 2173. Using two-dimensional gel electrophoresis and a shotgun proteomic approach, a total of 398 proteins appeared to be more abundant in cells exposed to 2-EHN...
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