Isothioureas, Ureas, and Their N-Methyl Amides from 2-Aminobenzothiazole and Chiral Amino Acids
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چکیده
منابع مشابه
Synthesis of N-Sulfonyl Amidines and Acyl Sulfonyl Ureas from Sulfonyl Azides, Carbon Monoxide, and Amides.
A Pd-catalyzed and ligand-free carbonylation/cycloaddition/decarboxylation cascade synthesis of sulfonyl amidines from sulfonyl azides and substituted amides at low CO pressure is reported. The reaction proceeds via an initial Pd-catalyzed carbonylative generation of sulfonyl isocyanates from sulfonyl azides, followed by a [2 + 2] cycloaddition with amides and subsequent decarboxylation, which ...
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Complexing properties and chirality of carbohydrates were utilized in diastereoselective reactions of 0-pivaloylated N-galactosylimines with allylsilanes and -stannaries. With dyltrimethylsilane in the presence of SnCh, imines 2 of aromatic and heteroaromatic aldehydes were converted to homdylamines 3, giving ratios of diastereomers higher than 7:l. No addition products derived from a-anomeric ...
متن کاملCHIRAL SEPARATIONS Amino Acids and Derivatives See III /AMINO ACIDS AND DERIVATIVES: CHIRAL SEPARATIONS
use by the OPCW inspectorate. Use of GC with one or more spectrometric technique such as mass spectrometry is required to conRrm the presence of chemical warfare agents. For this reason many analyses are carried out by GC-MS under electron impact or chemical ionization conditions. For analyses involving low levels of chemical warfare agents in the presence of high levels of interfering chemical...
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گوشت قرمز یکی از مهم ترین فرآورده های دامی در تأمین پروتئین و انرژی می باشد که در حمل ویتامین های محلول در چربی نیز حائز اهمیت می باشد. انسان مانند سایر مهره داران اسید های چرب ضروری (لینولئیک و آلفا لینولنیک) مورد نیاز خود از طریق غذا تأمین می نماید. اسید های چرب ضروی پیش ساز اسید های چرب غیر اشباع با چند پیوند دوگانه هستند. اسید لینولنیک پیش ساز اسیدهای چرب امگا 3 و اسید لینولئیک نیز پیش ساز ...
Amino Acids and Derivatives: Chiral Separations
particularly because with TLC various phase systems can be checked at the same time without expensive apparatus. TLC will continue to serve as a useful method for daily routine control analyses to identify and determine the purity of a variety of compounds, including enantiomers, with ease and speed, and can be readily modiRed for new situations. A wide choice for separation conditions will alw...
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ژورنال
عنوان ژورنال: Molecules
سال: 2019
ISSN: 1420-3049
DOI: 10.3390/molecules24183391