AR108531A1 - SYNTHESIS OF 6-ARIL-4-AMYNOPYCHOLINATES AND 2-ARIL-6-AMYNOPIRIMIDIN-4-CARBOXYLATES THROUGH DIRECT SUZUKI COUPLING - Google Patents

SYNTHESIS OF 6-ARIL-4-AMYNOPYCHOLINATES AND 2-ARIL-6-AMYNOPIRIMIDIN-4-CARBOXYLATES THROUGH DIRECT SUZUKI COUPLING

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Publication number
AR108531A1
AR108531A1 ARP170101357A ARP170101357A AR108531A1 AR 108531 A1 AR108531 A1 AR 108531A1 AR P170101357 A ARP170101357 A AR P170101357A AR P170101357 A ARP170101357 A AR P170101357A AR 108531 A1 AR108531 A1 AR 108531A1
Authority
AR
Argentina
Prior art keywords
alkyl
aryl
carboxylates
chloro
halogen
Prior art date
Application number
ARP170101357A
Other languages
Spanish (es)
Inventor
Ronald B Leng
James W Ringer
Shawn D Feist
Reetam Chakrabarti
Mark A Nitz
Siyu Tu
Jossian Oppenheimer
Robert S Bauman
Mark Muehlfeld
Xiaoyong Li
Jason S Fisk
Original Assignee
Dow Agrosciences Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Agrosciences Llc filed Critical Dow Agrosciences Llc
Publication of AR108531A1 publication Critical patent/AR108531A1/en

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  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Pyridine Compounds (AREA)

Abstract

En la presente se describen métodos mejorados para la síntesis de 6-aril-4-aminopicolinatos, tales como arilalquilo y 4-amino-3-cloro-6-(4-cloro-2-fluoro-3-metoxifenil)piridina-2-carboxilatos de alquilo y 4-amino-3-cloro-5-fluoro-6-(4-cloro-2-fluoro-3-metoxifenil)piridina-2-carboxilatos de alquilo y arilalquilo. Los métodos mejorados incluyen una etapa de acopamiento Suzuki directo, que elimina las etapas de protección / desprotección en los procesos químicos actuales y, por lo tanto, elimina o reduce las diversas materias primas, equipos y tiempos de ciclo, así como la modificación de otras condiciones de los procesos que incluyen el uso de AP bruta, uso de ABA-diMe, y variación del pH, concentración del catalizador, composición del solvente y/o procedimientos de tratamiento. La presente se amplió para que incluya la síntesis de 2-aril-6-aminopirimidina-4-carboxilatos. Reivindicación 1: Un método para preparar 6-aril-4-aminopicolinatos de la fórmula (1), en la que Q representa hidrógeno o halógeno; R representa hidrógeno, alquilo, arilo o arilalquilo; W representa H, halógeno, alquilo C₁₋₄ o alcoxi C₁₋₃; X representa H; Y representa halógeno, alquilo C₁₋₄ o alcoxi C₁₋₃; y Z representa H, halógeno, alquilo C₁₋₄ o alcoxi C₁₋₃; en el que el método comprende acoplar una aminopiridina (AP) y un ácido fenilborónico (PBA) mediante acoplamiento Suzuki directo en presencia de un catalizador, en el que la concentración del catalizador es igual o menor que alrededor de 3% en relación con el reactivo limitante y el rendimiento del 6-aril-4-aminopicolinato es de al menos alrededor de 60%.Improved methods for the synthesis of 6-aryl-4-aminopicolinates, such as arylalkyl and 4-amino-3-chloro-6- (4-chloro-2-fluoro-3-methoxyphenyl) pyridine-2- are described herein. alkyl carboxylates and 4-amino-3-chloro-5-fluoro-6- (4-chloro-2-fluoro-3-methoxyphenyl) pyridine-2-alkyl and arylalkyl carboxylates. The improved methods include a direct Suzuki coupling stage, which eliminates the protection / deprotection stages in the current chemical processes and, therefore, eliminates or reduces the various raw materials, equipment and cycle times, as well as the modification of other Process conditions that include the use of crude AP, use of ABA-diMe, and pH variation, catalyst concentration, solvent composition and / or treatment procedures. The present was extended to include the synthesis of 2-aryl-6-aminopyrimidine-4-carboxylates. Claim 1: A method of preparing 6-aryl-4-aminopicolinates of the formula (1), wherein Q represents hydrogen or halogen; R represents hydrogen, alkyl, aryl or arylalkyl; W represents H, halogen, C₁₋₄ alkyl or C₁₋₃ alkoxy; X represents H; Y represents halogen, C₁₋₄ alkyl or C₁₋₃ alkoxy; and Z represents H, halogen, C₁₋₄ alkyl or C₁₋₃ alkoxy; wherein the method comprises coupling an aminopyridine (AP) and a phenylboronic acid (PBA) by direct Suzuki coupling in the presence of a catalyst, in which the catalyst concentration is equal to or less than about 3% in relation to the reagent Limiting and yield of 6-aryl-4-aminopicolinate is at least about 60%.

ARP170101357A 2016-05-19 2017-05-19 SYNTHESIS OF 6-ARIL-4-AMYNOPYCHOLINATES AND 2-ARIL-6-AMYNOPIRIMIDIN-4-CARBOXYLATES THROUGH DIRECT SUZUKI COUPLING AR108531A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201662338562P 2016-05-19 2016-05-19

Publications (1)

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AR108531A1 true AR108531A1 (en) 2018-08-29

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ARP170101357A AR108531A1 (en) 2016-05-19 2017-05-19 SYNTHESIS OF 6-ARIL-4-AMYNOPYCHOLINATES AND 2-ARIL-6-AMYNOPIRIMIDIN-4-CARBOXYLATES THROUGH DIRECT SUZUKI COUPLING

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AR (1) AR108531A1 (en)

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