Alkylations and Hydroxymethylations of Pyrazines via Green Minisci-Type Reactions
摘要:
A new general methodology utilizing Minisci-type chemistry has been developed that cleanly and efficiently prepares alkyl- and (hydroxymethyl)pyrazines. The new methods eliminate toxic catalysts and halogenated solvents, providing a greatly improved route to these natural products which are prevalent in many natural systems as bacterial volatiles, plant volatiles, and insect pheromones.
Alkylations and Hydroxymethylations of Pyrazines via Green Minisci-Type Reactions
摘要:
A new general methodology utilizing Minisci-type chemistry has been developed that cleanly and efficiently prepares alkyl- and (hydroxymethyl)pyrazines. The new methods eliminate toxic catalysts and halogenated solvents, providing a greatly improved route to these natural products which are prevalent in many natural systems as bacterial volatiles, plant volatiles, and insect pheromones.
[EN] SMOKING ARTICLE HAVING INCREASED AMINO ACID CONTENT<br/>[FR] ARTICLE A FUMER AYANT UNE TENEUR ACCRUE EN AMINO-ACIDES
申请人:REYNOLDS TOBACCO CO R
公开号:WO2000022946A1
公开(公告)日:2000-04-27
A smoking article is provided having improved flavor and aroma when smoked and contains one or more smokable materials having free amino acids contained therein. The smoking article comprises a selectively enriched content of at least one amino acid selected from the group consisting of serine, threonine and analogs thereof, and is substantially free of exogenous non-sugar Maillard-functional carbonyl compounds.
[EN] NOVEL COMPOUND AND USE THEREOF AS PDE10 INHIBITOR<br/>[FR] NOUVEAU COMPOSÉ ET SON UTILISATION À TITRE D'INHIBITEUR DE PDE10