| 摘要 |
<p>Disclosed is a production method which enables mass synthesis of an aminoalcohol derivative with high optical purity at low cost. For example, a compound represented by the general formula is recrystallized during the production procedure. (In the formulae, R1 represents, for example, a trihalomethyl group; R2 represents, for example, a hydrogen atom; R3 represents, for example, a halogen atom; R4 represents, for example, a lower alkyl group; X represents a sulfur atom; n represents an integer of 1-4; and W represents hydrogen chloride or hydrogen bromide.)</p> |
