Ajinomoto Co., Ltd.

Masahiko Kurauchi

Kunisuke Izawa

Takashi Nakano

Hiroyuki Sato

Hiroyuki Matsueda

Yoshimasa Hagiwara

Yuki Miyazawa

Chikahiko Eguchi

Tohru Nakamura

Makoto Takeuchi

Shumpei Sakakibara

Toshihisa Kato

Kiyonori Furuta

Shigebumi Hashimoto

According to the present invention, there are provided a novel partial ester of a nitrogenous carboxylic acid ester with cellulose, the partial ester being useful as an antibacterial agent, a flame retardant, etc., and a simple and convenient process for preparing the same. Fibers made of said partial ester have washing-resistant antibacterial property and flame retardancy. There can be prepared the partial ester of a nitrogenous carboxylic acid ester with cellulose by contacting a nitrogenous carboxylic acid ester with cellulose and heat-treating the mixture.

Partial ester of cellulose with nitrogenous carboxylic acid and process for producing the same

Herein are disclosed a tillering promoter for a plant comprising an amino acid, especially proline, or inosine in addition thereto, as effective ingredient(s), and a method for tillering promotion for a plant wherein the tillering promoter is especially applied onto the leaf surfaces, in accordance with which are provided a tillering promoter for a plant which enables the reduction of the amount of fertilizer hitherto used in a large amount and the maintenance of a satisfactory green state by promoting the tillering of a plant, especially lawn grass without requiring the application of pesticides and plant hormones, also exhibits growth promotion and coloring promotion of leaves, is not a chemical fertilizer, and does not adversely affect the environment and men and beasts, and a method for applying the same.

Tillering promoter for plant and method for tillering promotion of plant

Herein is disclosed a withering-preventing and quick-acting nutrition supplementing agent for a gramineous or the like plant such as a lawn grass or the like which agent comprises, as the effective ingredient (s), proline alone or both proline and inosine concurrently, according to which a withering preventing and quick-acting nutrition supplementing agent which is not a chemical fertilizer and does not adversely affect environment and humans and animals, as well as a method for applying the same, can be provided.

Withering-preventing and quick-acting nutrition supplementing agent for gramineous plants

Provided is an industrially useful process for producing an optically active 2-hydroxy-4-arylbutyric acid or its ester. An optically active acyloxysuccinic anhydride is reacted with an aromatic compound in the presence of a Lewis acid to produce an optically active 2-acyloxy-4-oxo-4-arylbutyric acid. The 2-acyloxy-4-oxo-4-arylbutyric acid is converted to an optically active 2-acyloxy-4-arylbutyric acid through catalytic reduction. The 2-acyloxy-4-arylbutyric acid is hydrolyzed in the presence of an acid or an alkali to produce an optically active 2-hydroxy-4-arylbutyric acid. The 2-hydroxy-4-arylbutyric acid is reacted with an alcohol in the presence of an acid to produce an optically active 2-hydroxy-4-arylbutyric acid ester.

Process for producing optically active 2-hydroxy-4-arylbutyric acid or its ester

Process for producing optically active 2-hydroxy-4-arylbutyric acid or

5-Cyclohexylmethylhydantoin derivatives may be conveniently prepared by reducing, in the presence of a metal catalyst, a 5-(3-cyclohexene-1-yl)melthylenehydantoin derivative which is obtained by the condensation of a hydantoin derivative and a 3-cyclohexene-1-carbaldehyde derivative in the presence of a monoalkanolamine.

Method for the production of 5-cyclohexylmethylhydantoin derivatives

N-t-butyloxycarbonyl-3-cyclohexyl-L-alanine methyl ester, previously known only as an oil, is provided in crystalline form. By addition of an organic solvent, such as methanol and/or n-hexane, to the ester in the form of an oil and cooling, crystals may be obtained. Alternatively, the ester in oily form may be seeded with a crystal produced previously. The crystalline material is of higher purity than the previously known oils, and is more useful than the oils as an intermediate in the pharmaceutical industry.

N-t-butyloxycarbonyl-3-cyclohexyl-L-alanine methyl ester in crystalline

Improved methods for synthesizing glutamine-containing peptides, involving an active ester method between a protected, C-terminal activated amino acid or a protected, C-terminal activated peptide, and unprotected glutamine in the presence of a weak base, are disclosed.

Process for the production of glutamine derivatives

There are disclosed dipeptide derivatives represented by the general formula: ##STR1## wherein R.sup.1 is a radical selected from the group consisting of alkyl, aralkyl and aryl groups optionally containing one or more substituent groups, R.sup.2 is a radical selected from the group consisting of hydrogen atoms and alkyl, aralkyl and aryl groups optionally containing one or more substituent groups, R.sup.3 is a radical selected from the group consisting of hydrogen atoms and alkyl, aralkyl and aryl groups optionally containing one or more substituent groups, R.sup.4 is a radical selected from the group consisting of hydrogen atoms and alkyl, aralkyl and aryl groups optionally containing one or more substituent groups, and R.sup.5 is a radical selected from the group consisting of hydroxyl, amino, hydroxyamino, alkyloxy, aralkyloxy, aryloxy, alkylamino, aralkylamino, arylamino, alkyloxyamino, aralkyloxyamino, aryloxyamino, acylamino and sulfonylamino groups, which alkyloxy, aralkyloxy and aryloxy groups optionally containing one or more substituent groups; wherein R.sup.3 may be combined with R.sup.2 or R.sup.4 to form an alkylene bridge optionally containing one or more oxygen atoms, sulfur atoms and nitrogen atoms and optionally containing one or more substituent groups. However, certain dipeptide derivatives within the above general formula are excluded from the invention. The dipeptide derivatives are useful for the treatment of hypertension.

Dipeptide derivatives and antihypertensive drugs containing them

An amino acid derivative having anti-hypertensive activity and having the formula: ##STR1## wherein one of X or Y represents an acyl group RCO--, and wherein R is an amino acid residue selected from the group consisting of glycyl, alanyl, valyl, leucyl, isoleucyl, phenylalanyl, methionyl, prolyl, ceryl, threonyl, arginyl, lysyl, histidyl, aspartyl, asparaginyl, tyrosyl, cysteinyl, tryptophyl, and hydroxyprolyl, and the other group is H; R.sup.1 and R.sup.2 are the same or different from each other, and each represents H, lower alkyl having 1 to 6 carbon atoms, aryl having 6 to 12 carbon atoms, any of which are unsubstituted or substituted by one or more lower alkyl, lower alkoxy, hydroxy, amino, carboxy or mercapto groups; Z represents --OH, RO--, RS--, RNH--, NONH--, RONH--, RSO.sub.2 NH--, RCONH--, or RCSNH--; and wherein R as defined above for the moiety Z is H, lower alkyl having 1 to 6 carbon atoms, aryl having 6 to 12 carbon atoms or aralkyl having 6 to 12 carbon atoms, any of which are unsubstituted or substituted by one or more lower alkyl, lower alkoxy, hydroxy, amino, carboxy or mercapto groups.

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Kawasaki, Japan

Masahiko Kurauchi