发明申请
US20140171654A1 PROCESSES FOR THE PREPARATION OF 4-AMINO-3-HALO-6-(SUBSTITUTED)PICOLINATES AND 4-AMINO-5-FLUORO-3-HALO-6-(SUBSTITUTED)PICOLINATES 有权
制备4-氨基-3-羟基-6-(取代的)吡啶甲酸酯和4-氨基-5-氟-3-羟基-6-(取代的)吡啶甲酸酯的方法

PROCESSES FOR THE PREPARATION OF 4-AMINO-3-HALO-6-(SUBSTITUTED)PICOLINATES AND 4-AMINO-5-FLUORO-3-HALO-6-(SUBSTITUTED)PICOLINATES
摘要:
4-Amino-3-chloro-6-(substituted)picolinates are prepared from difluoroacetic acid or trifluoroacetic acid, tritylamine or t-butylamine as a protecting group, a 3,3-dialkoxyprop-1-yne and a substituted methylene amine by a series of steps.
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