摘要:
Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonamides, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide and their agriculturally acceptable salt are prepared. These compounds and compositions containing them are useful for the control of unwanted vegetation. Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides and substituted anilines and their use as intermediates are also described.
摘要:
Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide and their compositions and use in the control of weeds and in the suppression of nitrificatin of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
摘要:
N-aryl-5,6,7-substituted-1,2,4,-triazolo-[1,5-a]pyrimidine-2-sulfonamides undergo oxidative ring cleavage to afford herbicidal substituted N-aryl-5-amino-1,2,4-triazole-3-sulfonamides. These triazolesulfonamides can undergo cyclizations with 1,3-dicarbonyls to form novel herbicidal substituted N-aryl-5,6,7-substituted-1,2,4-triazolo-[1,5-a]pyrimidine-2-sulfonamides.
摘要:
A process for the crystallization of an iron-dextran complex in readily-filterable form comprising adding slowly, with stirring, an acidified aqueous iron-dextran solution to a vessel containing a water miscible organic solvent such as methanol, as well as crystalline iron-dextran complexes so prepared.
摘要:
Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonamides, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide and their agriculturally acceptable salt are prepared. These compounds and compositions containing them are useful for the control of unwanted vegetation. Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides and substituted anilines and their use as intermediates are also described.
摘要:
Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonamides, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide and their agriculturally acceptable salts are prepared. These compounds and compositions containing them are useful for the control of unwanted vegetation. Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides and substituted anilines and their use as intermediates are also described.
摘要:
Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamide and their compositions and use in the control of weeds and in the suppression of nitrification of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
摘要:
The present invention relates to a process for preparing a cross-linked pollyallylamine hydrochloride. The process involves mixing polyallylamine hydrochloride, water, a hydroxide or alkoxide, and a water-miscible organic solvent or co-solvents, to a reaction mixture and adding a cross-linking agent to the reaction mixture to form a cross-linked polyallylamine.
摘要:
A process of protecting a 1,2- or 1,3-aminoalcohol for reductive amination coupling is provided. The alcohol is protected with trimethylsilyl chloride. Trimethylsilyl protected norepinephrine derivatives useful in the preparation of arbutamine are also provided.
摘要:
The present invention provides a process for the preparation of BPD 1,4-diene diester A-ring comprising reacting hematoporphyrin IX dimethyl ester with dimethyl acetylenedicarboxylate followed by purification of the product by a series of fractional crystallizations.