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Iron-catalyzed Benzannulation Reactions of 2‑Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for the synthesis of naphthalene derivatives via Fe(III)-catalyzed benzannulation of 2-(2-oxoethyl)-benzaldehydes and alkynes has been developed. The system holds the advantages of cheap catalysts, wide substrate scope, and mild reaction conditions. S. Zhu y col. Org. Lett. (South China University of Technology, Guangzhou)) 5% mol 1-2 h, 60 ºC

Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

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Page 1: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Iron-catalyzed Benzannulation Reactionsof 2‑Alkylbenzaldehydes and AlkynesLeading to Naphthalene Derivatives

An efficient and practical method for the synthesis of naphthalene derivatives via Fe(III)-catalyzed benzannulation of 2-(2-oxoethyl)-benzaldehydes

and alkynes has been developed. The system holds the advantages of cheap catalysts, wide substrate scope, and mild reaction conditions.

S. Zhu y col. Org. Lett. (South China University of Technology, Guangzhou))

5% mol1-2 h, 60 ºC

Page 2: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Trabajo previo

Este trabajo

Page 3: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

R

R

R

Catalizadores: AgSbF6, ZnCl2, FeCl3

No reacción sin catalizador o con catálisis ácida (H+)

H,OMe, F, CF3 H, Ph, Alquilo, Br

XC6H4, Alquilo

60-99%X: MeO, Me, Cl, H,(CF3)2

Page 4: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Mecanismo propuesto

Page 5: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

N

O

RO

R1

R3

R4

N

OR

OH

R1

O

N

R3

R4

R

OH

R1

N

R3

R4

R1

N

O

RO

R1

R3

R4

N

OR

OH

R1

O

NR

3

R4

R

OH

R1

N

R3

R4

R1

N

O

RO

R1

R3

R4

N

OR

OH

R1

N

O

R3

R4

R

OH

R1

N

R3

R4

R1

Fe3+

Fe3+

Fe3+

+ ++ +

¿Síntesis de heterociclos?

Page 6: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Synthesis of Pinacol Arylboronates from Aromatic Amines: A Metal-Free Transformation

F. Mo, J. Wang y col. J. Org. Chem. (Beijing National Laboratory of Molecular Sciences)

Page 7: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Rutas a ácidos arilborónicos y arilboronatos

Page 8: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Comparación con otros métodos

- Ausencia de metal- Arilaminas abundantes y no caras- Tolerancia de grupos funcionales- Condiciones suaves

BPO

Page 9: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Productos aromáticos

Page 10: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Boración-acoplamiento C-C secuenciales

Het-Bpin inestable en gel de sílice

Escalable a cantidades de multigramo

Page 11: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Mecanismo propuesto

Page 12: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Synthesis of Imidazo[1,2-a]pyridines: “Water-Mediated” Hydroamination and Silver-Catalyzed Aminooxygenation

S. Adimurthy y col. J. Org. Chem. (Central Salt and Marine Chemicals Research Institute, Gujarat)

Page 13: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

ansiolítico

Fallo cardiaco

Osteoporosis

VIH

ansiolíticosedante

Page 14: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Hidroaminación

Page 15: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Deuteración

Page 16: Iron-catalyzed Benzannulation Reactions of 2 ‑ Alkylbenzaldehydes and Alkynes Leading to Naphthalene Derivatives An efficient and practical method for

Aminooxigenación