Artigo
Convergent Total Synthesis of (+/-)-Apomorphine via Benzyne Chemistry: Insights into the Mechanisms Involved in the Key Step
Fecha
2017Registro en:
Synthesis-Stuttgart. Stuttgart, v. 49, n. 16, p. 3546-3557, 2017.
0039-7881
10.1055/s-0036-1588855
WOS:000407139300003
Autor
Muraca, Ana Carolina A. [UNIFESP]
Perecim, Givago P. [UNIFESP]
Rodrigues, Alessandro [UNIFESP]
Raminelli, Cristiano [UNIFESP]
Institución
Resumen
Convergent total synthesis of (+/-)-apomorphine hydrochloride was accomplished by an approach that employs in the key step a sequence of transformations involving a [4+2]-cycloaddition reaction followed by a hydrogen migration. Through this sequence of transformations, the desired aporphine core was obtained regioselectively in 75% isolated yield. Since only one regioisomer was produced in the key step of the synthesis, a polar [4+2]-cycloaddition mechanism was proposed. Furthermore, NMR experiments and theoretical calculations were carried out to elucidate the hydrogen migration mechanism. (+/-)Apomorphine hydrochloride was achieved after 9 steps in an overall yield of 8% involving benzyne chemistry.