Patent ID: 6437181
Filing Date: 2002-08-20
Classification: C07C

Abstract:
A method for preparing a (S,S)-N,Nâ€² alkyldiamine of formula R1N(H)R3N(H)R2, or a salt thereof, where R1 and R2 are C(H)(COOH)(CH2COOH), C(H)(COOH)(CH2CH2COOH), or C(H)(COOH)(CH2SO3H) and R3 is CH2CH2 or CH2C(H)(OH)CH2, comprising reacting a compound of the formula RNH2 or a salt thereof where R=R1 or R2 with 1,2-bissulfooxyethane, 1,3,2-dioxathiolane 2,2-dioxide, or 1,2-bissulfooxy-2-hydroxypropane in the presence of a base.