Results 31 to 40 of about 13,234 (272)

Synthesis and late-stage functionalization of complex molecules through C-H fluorination and nucleophilic aromatic substitution. [PDF]

open access: yes, 2014
We report the late-stage functionalization of multisubstituted pyridines and diazines at the position α to nitrogen. By this process, a series of functional groups and substituents bound to the ring through nitrogen, oxygen, sulfur, or carbon are ...
Fier, Patrick S, Hartwig, John F
core   +3 more sources

Analysis of Flavor Composition in Different Peanut Varieties᾽ Butter

open access: yesLiang you shipin ke-ji, 2023
In this paper, the flavor substances of five varieties of peanut butter were mainly studied by gas chromatography-mass spectrometry (GC-MS). The results showed that the total number of flavor substances was 62, 55, 46, 46 and 44 in “Baisha”, “Luohan ...
HU Jun-jing   +3 more
doaj   +1 more source

Reactions and Syntheses of Pyrazines

open access: yesYAKUGAKU ZASSHI, 1997
This review deals with syntheses and reactions of pyrazines, especially, of 2,5-disubstituted pyrazines. The description was made in due to order of 1) synthesis and properties of 2,5-disubstituted pyrazines, 2) synthesis of 2,5-disubstituted pyrazine N-oxides, 3) synthesis of pyrazinols, 4) synthesis and utilization of pyrazinethiols; preparation of ...
A, Ohta, Y, Aoyagi
openaire   +3 more sources

Reduction of Saltiness and Acrylamide Levels in Palm Sugar-Like Flavouring through Buffer Modification and the Addition of Calcium Chloride

open access: yesMolecules, 2013
Palm sugar-like flavouring (PSLF) is a type of flavour product that is formed by heating amino acids and sugar under specific heating conditions. Unfortunately, PSLF has a salty taste and contains high amounts of acrylamide.
Wan Aida Wan Mustapha   +4 more
doaj   +1 more source

Research Progress of the Detection, Source, Aroma and Functional Activity of Pyrazine Compounds in High Temperature Daqu Baijiu

open access: yesShipin gongye ke-ji, 2023
Microcompounds, the key factors for the difference of flavor and quality in Baijiu, are one of the hot topics in the research field of Baijiu. Pyrazine compounds are a kind of microcompounds which contribute to the formation of the flavor in Baijiu, and ...
Yanmei ZHU   +3 more
doaj   +1 more source

Lentzeacins A-E, New Bacterial-Derived 2,5- and 2,6-Disubstituted Pyrazines from a BGC-Rich Soil Bacterium Lentzea sp. GA3-008

open access: yesMolecules, 2021
Pyrazines (1,4-diazirines) are an important group of natural products that have tremendous monetary value in the food and fragrance industries and can exhibit a wide range of biological effects including antineoplastic, antidiabetic and antibiotic ...
Hong-Bing Liu   +6 more
doaj   +1 more source

Progress on the Synthesis Pathways and Pharmacological Effects of Naturally Occurring Pyrazines

open access: yesMolecules
As one of the most essential types of heterocyclic compounds, pyrazines have a characteristic smell and taste and have a wide range of commercial applications, especially in the food industry.
Xun Liu, Wenli Quan
doaj   +1 more source

The Chemistry behind Chocolate Production

open access: yesMolecules, 2019
Chocolate production is a complex process during which numerous chemical reactions occur. The most important processes, involving most of the reactions important for development of the proper chocolate flavor, are fermentation, drying and roasting of ...
Veronika Barišić   +8 more
doaj   +1 more source

Optimisation of the post-harvest conditions to produce chocolate aroma from jackfruit seeds [PDF]

open access: yes, 2017
Jackfruit seeds are an under-utilized waste in many tropical countries. In this work, we demonstrate the potential of roasted jackfruit seeds to develop chocolate aroma.
Cabreira Ragazi, Gabriel   +6 more
core   +1 more source

GC-Olfactometric Analysis as a Tool for Comprehensive Characterization of Aromatic Profiles in Cocoa-Based Beverages with a Natural Chocolate Substitute

open access: yesFermentation
Cocoa is the third most important global agricultural export commodity. However, because it is a crop sensitive to climatic change, there has been an active search for cocoa substitutes worldwide.
Fernanda Papa Spada   +3 more
doaj   +1 more source

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