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.

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 analogs 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.