Boric acid amide esters

Thioboric acid esters and boric acid amide esters... 

B,0-Heterocyclics. o-Phenylene chlorohoronate heated with 2.2 moles n-hutane-thiol at 150-160° for 4 hrs. S-n-hutyl o-phenylene thiohorate. Y 79%.—These are the first reported examples of monothiohoric acid esters. A thio as well as a suhst. amino group attached to a horon atom is replaceable by an alkoxy group but not the reverse. F. e., also cyclic boric acid amide esters, s. W. Gerrard, M. F. Lappert, and B. A. Mountfield, Soc. 1959, 1529. 

A number of basic materials such as hydroxides, hydrides and amides of alkaline and alkaline earth metals and metal oxides such as zinc oxide and antimony oxide are useful catalysts for the reaction. Acid ester-exchange catalysts such as boric acid, p-toluene sulphonic acid and zinc chloride are less... 

The cyclic boron esters (99) resulted from the three-component reaction between benzil (96), urea (97), and boric acid (Scheme 21). The stereoisomeric products arose as a consequence of boric acid addition to the intermediate cyclic amides (98) <89PHA110>. Carbon-13 NMR spectroscopy and mass spectrometry are consistent with structure (99). 

Poly(vinyl alcohol) is utilized as a component of starch-based adhesives.11121114 Other patents report the use of partially oxidized starch,1115 dextrins,1116 dextrins and urea,1117 borax,1118 boric acid,1119 and vinyl methyl ether-maleic acid copolymers.1120 Other patents indicate the use of poly (vinyl alcohol) with partially hydrolyzed poly(vinyl acetate),1121 nonhy-drolyzed poly(vinyl acetate),1122 and poly(vinyl chloride).1123 A few patents have reported such poly acrylic additives as poly (acrylic acid)1124 and its salts,1125 poly(acrylamide),1126 1127 A-methylacrylamide or poly(A-acryl-amide),1128 and polyethyleneimine.1129 Polystyrene has also been used,1130 as well as more complex copolymers such as a maleic acid monobutyl ester-methyl vinyl ether copolymer, together with dextrin and polyacrylamide),1131 carboxylated ethyl acrylate-styrene zinc salt copolymer,1132 ethylene-methyl acrylate-vinyl acetate copolymer,1133 vinyl acetate-vinyl pyr-rolidone copolymer,1134 and ethylene-vinyl acetate copolymer.1135 Some adhesives are compounded with SBR latex1136 1138 and phenol-formaldehyde resins.1139... 

Boric acid esters/p-toluenesulfonic acid Carboxylic acid amides from carboxylic acids... 

Amides are usually made from acids (or esters) and ammonia in a batch operation conducted at 180-200°C and 50-100psi. A catalyst, such as boric acid or alumina or zinc alkoxide, is optional and urea (at a reaction temperature of 170-240 °C) may replace ammonia. The amides, especially those based on oleic or erucic acid, are used as anti-slip... 

Fatty amides can be made directly from either fatty acids or fatty esters by ammonolysis and dehydration. The reaction is done at high temperature over a boric acid or metal oxide catalyst, and the crude product can be distilled and stabilized with antioxidants and chelants to reduce colour and odour. Substituted amides can be made by replacing... 

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