10385-49-6Relevant articles and documents
Glucosamide compound and preparation and application thereof
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Paragraph 0034; 0035; 0036, (2017/06/21)
The invention relates to a glucosamide compound and a preparation method thereof. The glucosamide compound has a structure as shown in the formula (I). In the formula (I), R is methoxy group, nitro group, amino-group, hydroxyl group, C1-4 alkyl group or halogen, n is the number of substituent groups, and n is 1 or 2. The glucosamide compound is simple to prepare, has excellent plant induced resistance activity, and can be used as a plant induced resistance agent for controlling cucumber bacterial angular leaf spot, cucumber target leaf spot and tomato late blight. The invention also relates to a plant induced resistant agent containing the compound.
Protected glycosides and disaccharides of 2-amino-2-deoxy-D-glucopyranose by ferric chloride-catalyzed coupling.
Kiso,Anderson
, p. 309 - 323 (2007/10/02)
The ferric chloride-catalyzed glycosylation of hydroxy compounds by protected 2-acylamino-2-deoxy-beta-D-glucopyranose 1-acetates is described. In addition to known glycosides from the reaction of alcohols with 2-acetamido-1,3,4,6-tetra-O-acetyl-2-deoxy-beta-D-glucopyranose (3), ally (and other alkyl) beta-glycosides were obtained from the N-benzoyl, N-phenoxyacetyl, N-methoxyacetyl, N-chloroacetyl, and N-phthaloyl congeners of 3. The latter compounds, except for the N-phthaloyl derivative, gave oxazolines in the absence of an alcoholic reactant. Compound 3 and the related N-benzoyl, N-chloroacetyl, N-acetyl-3,4,6-tri-O-benzyl, and N-acetyl-4-O-acetyl-3,6-di-O-benzyl derivatives were coupled to one or more protected sugars to form protected, beta-linked disaccharides. Coupling at the 6-positions of acceptors proceeded smoothly and gave 67-80% yields. For successful coupling at positions 3 and 4, long reaction times and multiple additions of glycosyl donor were required, and yields ranged from 60% to as low as 30%. 1,3,4,6-Tetra-O-acetyl-2-(chloroacetamido)-2-deoxy-beta-D- glucopyranose appeared to be the most reactive glycosyl donor in this series. The reaction of 2-methyl-(3,4,6-tri-O-acetyl-1,2-dideoxy-alpha-D-glucopyrano)[2,1- d]-2-oxazoline (derived from 3) with allyl alcohol was catalyzed by ferric chloride, and oxazolines were detected as intermediates in some of the glycosylations of protected sugars.