The present invention relates to an improved process for the preparation of optically chiral amino compound. The present invention particularly relates to the improved process for the preparation of (S)-1-amino-2,3-dihydro-1H-indene-4-carbonitrile, an important intermediate for the synthesis of ozanimod. The present invention more particularly relates to preparation of (S)-1-amino-2,3-dihydro-1H-indene-4- carbonitrile using 4-cyano-1-indanone and α-methylbenzylamine derivatives as starting materials. The present invention specifically relates to preparation of (S)-1- amino-2,3-dihydro-1H-indene-4-carbonitrile comprising diastereoselective chiral amine synthesis by protection with chiral auxiliary -methyl benzylamine derivatives followed by reduction and debenzylation.
本发明涉及一种改进的制备光学手性
氨基化合物的方法。本发明特别涉及改进的制备(S)-1-
氨基-2,3-二氢-1H-
茚-4-碳腈的方法,该化合物是合成奥扎尼莫德的重要中间体。本发明更特别地涉及使用4-
氰基-
1-茚酮和α-甲基
苄胺衍
生物作为起始材料制备(S)-1-
氨基-2,3-二氢-1H-
茚-4-碳腈的方法。本发明具体涉及通过使用手性辅助剂α-甲基
苄胺衍
生物保护进行对映选择性手性胺合成,随后进行还原和脱苄基制备(S)-1-
氨基-2,3-二氢-1H-
茚-4-碳腈的方法。