Abstract: The invention relates to derivatives of N,N?-substituted piperazines of the general formula (I): where R1 and R2 denote linear or branched (C1-C4)alkyl, linear or branched (C1-C4)alkoxy, CH3C(?O)O or halogen; n=1-5; m=0-3; Z denotes CH2, C?O or SO2; X denotes C(?NH)NH2, C(?NH)NHC(?NH)NH2 or CH2(CHR3)pCH2SO3H, where R3 denotes H, OH, CH3C(?O)O or HOSO2O and p=0-1; and G denotes low-molecular-weight organic or mineral acid, sodium, potassium or ammonium cations, or water. Said derivatives have antiaggregant, anticoagulant and vasodilatory properties. The invention further relates to a method for producing said derivatives by reacting N-substituted piperazines either with carboxamide amidating agents or salts thereof, or with haloalkyl sulfonic acids or salts thereof in organic solvents or in water in the presence of bases. The compounds may be used for the prophylaxis and treatment of disorders of the hemostatic system.

Abstract: The invention relates to the field of pharmaceutical chemistry, specifically to processes for preparing biologically active substances (BAS), in particular creatine amides. What is proposed is a process for preparing creatine amides which comprises treating creatine with para-toluenesulfonic acid in an organic solvent with subsequent reaction of the resultant complex with compounds comprising a primary or secondary amino group in the presence of a condensing agent and a base which are introduced subsequently. The claimed process makes it possible to increase the yield of the end product by 2-5 times in comparison with known similar processes and also to extend the range of the compounds prepared.

Abstract: The invention relates to pharmaceutical chemistry notably to new biologically active substances (BAS) and their properties. In particular, the invention relates to Creatine derivatives having a general formula: NH?C(NH2)—N(CH3)—CH2—CO—NH—R*X, wherein R—amino acid residue of aliphatic, aromatic or heteroaromatic L-amino acid or its derivative representing a salts of amino acid, amino acid esters, amino acid amides or peptides; X—lower organic or mineral acid or water. New substances are prepared by interaction of aforesaid amides of sarcosine having a general formula of HN(CH3)—CH2—CO—NH—R*X, wherein: R is amino acid residue or substituted amino acid residue; X is low-molecular-weight organic acid or mineral acid or water, with a guanidinylating agents with the in organic solvents at temperature not exceeding 50° C. New chemical compounds can be used as a remedy possessing a neuroprotective activity.