Borylation of calix[4]resorcinols under ultrasonic irradiation

The use of ultrasonic irradiation in the reactions of trialkyl borates with octahydroxytetraoctyl[l ₄] metacyclophane allowed us obtaining tetraalkoxyboratocavitands with higher yields and under milder conditions. We first obtained 1,3,2-dioxaborolane and 1,3,2-dioxaborinane derivatives of tetraoctyl[l ₄]metacyclophane using ultrasonic irradiation. Boratocavitands were converted into the corresponding amine complexes with isobutylamine.     

Phosphorylation of optically pure salicylal-1,2-diphenylethanediamine with alkylene chlorophosphites

Russian Journal of General Chemistry -     

Hydrophosphoryl Derivatives of Calix[4]resorcinolarenes

Russian Journal of General Chemistry -     

New bifunctional amphiphilic oxyethylimidazolium derivatives of calix[4]arene containing alkynyl/azide fragments: regularities of aggregation and polymerization under azide/alkyne cycloaddition conditions

Russian Chemical Bulletin - New bifunctional amphiphilic oxyethylimidazolium derivatives of calix[4]arene with terminal alkynyl or azide fragments in the polar moiety of the molecule were...     

Synthesis of 2-Arylpyrrolidines by Reactions of 3-Arylidene-1-pyrrolines with Phenols

Russian Journal of General Chemistry - The reaction of 3-arylidene-1-pyrrolines with phenols yielded 2-arylpyrrolidines. The proposed method makes it possible to obtain pyrrolidines containing a...     

Phosphorylation of Dialkylaminomethyl-substituted Calix[4]resorcinolarenes with Hexaalkylphosphorous Triamides and Phosphorus(V) Dichlorides

A series of aminophosphino cavitands were synthesized by reactions of dialkylaminomethyl-substituted calix[4]resorcinolarenes with hexaalkylphosphorous triamides, and their properties were studied. New aminoalkylated (thio)phosphato(phosphonato) cavitands were prepared by phosphorylation of dialkylaminomethyl-substituted calix[4]resorcinolarenes with phosphorus(V) dichlorides in the presence of a base. Their reactions with electrophilic alkylating agents (methyl trifluoromethanesulfonate, methyl iodide, and triethyloxonium tetrafluoroborate) were examined.     

Synthesis and aggregation properties of novel amino acetals with the calix[4]resorcinol platform

Reactions of calixarenes with methylaminoacetaldehyde dimethyl acetal and formalin gave Mannich bases with the calixarene platform. It was found by dielcometric titration that calix[4]resorcinols with acetal groups in the aminomethyl fragment form head-to-head supra-molecular aggregates in chloroform at low concentrations. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 888–891, May, 2006.     

Synthesis and some properties of 1,3,4,2-dioxazaphospholenes

Conclusions The cyclophosphorylation of benzhydroxamic acid gave a series of 2-substituted 1,3,4,2-dioxaza-4-phospholenes, which decompose upon heating to give benzonitrile.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 945–946, April, 1986.     

Synthesis of 1-(hydroxyaryl)furo[3,4-c]pyridines from 1-amino(alkoxy)furo[3,4-c]pyridines and (poly)phenols

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Aminomethylated calix[4]resorcinolarenes with NH groups on the upper rim of the molecule

The reaction of calix[4]resorcinolarenes with N,N-dimethylethylenediamine and aqueous CH₂O in a molar ratio of 1 : 5 : 5 affords calixarenes containing secondary amino groups arranged on the upper rim of the molecule. When the double amount (with respect to primary amine) of formalin is used (ratio of reactants 1 : 5 : 10), cavitands with four oxazinyl fragments are synthesized.