Enantioselective Heck-Matsuda Reactions of Spirocyclopentenyl Hydantoins Directed by Non-Covalent Interactions: Total Synthesis of the (S,S)-VPC01091

Autor(es)

de Oliveira, Valdeir C. ^[1] ; de Oliveira, Juliana M. ^[1] ; Menezes da Silva, Vitor H. ^[1] ; Khan, Ismat U. ^[2] ; Correia, Carlos Roque D. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Quim, Dept Quim Organ, CP 6154, BR-13083970 Campinas, SP - Brazil

^[2] Gomal Univ, Inst Chem Sci ICS, Dera Ismail Khan 29220 - Pakistan

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED SYNTHESIS & CATALYSIS; v. 362, n. 16 JUL 2020.
• Citações Web of Science: 0

Resumo

A highly efficient Heck-Matsuda desymmetrization of unsaturated spirohydantoins directed by non-covalent interactions, which allows the construction of two simultaneous stereogenic centers, including a trisubstituted quaternary one, is described. This Heck arylation permitted a novel enantioselective total synthesis of the S1PR1 agonist (also an S1PR3 antagonist) compound VPC01091, a potential drug for the treatment of multiple sclerosis. The broad scope of these enantioselective Heck-Matsuda protocol provided several arylated spiro systems in yields ranging from 76% to 99%, with enantiomeric ratios (er) up to 97:3, and diastereoselectivities (dr) of > 20:1 in all cases studied. The method uses only 2% of Pd(TFA) 2 and 3 mol% of the chiral N,N-ligand Pyrabox in short reaction times of 1-2 h. These enantioselective Heck arylations can also be carried out at the gram scale in high yields with no erosion of their diastereoselectivity or enantioselectivity. The key spiro Heck products (R,R)-21 and (R,R)-27 bearing an aryl iodide moiety or an aryl n-octyl moiety were employed as starting materials for the total enantioselective syntheses of the (S,S)-VPC01091, in overall yields of 20% and 22% respectively after 10 or 9 steps from the starting spirohydantoin, with an er> 95:5. Computational analysis of the enantioselective Heck-Matsuda desymmetrization supports the rationale involving a key non-covalent interaction between the imide carbonyl of the spirohydantoin and the cationic palladium bounded to the chiral N,N-ligand. (AU)

• Processo FAPESP: 13/07600-3 - CIBFar - Centro de Inovação em Biodiversidade e Fármacos
• Beneficiário: Glaucius Oliva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 14/25770-6 - Novas fronteiras em reações de acoplamento cruzado mediadas por paládio: associando catálise enantiosseletiva, ativações C-H, novos materiais e reações em fluxo visando alta eficiência e sustentabilidade em processos sintéticos
• Beneficiário: Carlos Roque Duarte Correia
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/18207-1 - Avaliação de novos catalisadores quirais de paládio e aplicação no desenvolvimento da reação de Heck-Matsuda enantiosseletiva em novos modelos olefínicos: estudos computacionais
• Beneficiário: Vitor Hugo Menezes da Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/01491-3 - Estudo teórico das reações de acoplamento-cruzado: catálise homogênea e heterogênea
• Beneficiário: Ataualpa Albert Carmo Braga
• Modalidade de apoio: Auxílio à Pesquisa - Regular