Science, Nature & Maths      Chemistry

Nova via para a síntese de 1,2,4-oxadiazina-5-onas quirais: síntese fácil de novas 1,2,4-oxadiazinas-5-onas quirais a partir de aminoácidos naturais

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Book Details
Language
Portuguese
Publishers
Edições Nosso Conhecimento (8 Aug. 2024)
Weight
0.09 KG
Publication Date
08/08/2024
ISBN-10
6207924398
Pages
56 pages
ISBN-13
9786207924394
Dimensions
15.24 x 0.33 x 22.86 cm
SKU
9786207924394
Author Name
Najeh TKA (Author)
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O trabalho de investigação realizado neste livro tem como objetivo desenvolver uma via de síntese simples e rápida para novos derivados quirais de 1,2,4-oxadiazina-5-onas conhecidas pelas suas interessantes actividades biológicas. A primeira parte deste livro descreve a síntese de uma série de α-bromoácidos opticamente activos por desaminação nitrosa enantioselectiva de aminoácidos naturais.

Estes reagem depois com cloreto de tionilo seguido de metanol para dar os α-bromoésteres correspondentes. A condensação destes α-bromoésteres previamente preparados com 1-benzenossulfonilpirrolidina-2-carboxamidoxima na presença de dois equivalentes de hidreto de sódio permitiu obter as novas 1,2,4-oxadiazina-5-onas quirais desejadas com bons rendimentos químicos.

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