A One-Pot Tandem Pictet-Spengler-Diels-Alder Synthesis of Apoyohimbines from 3-Carbomethoxy-2-(formylmethyl)-3-sulfolene
摘要:
Pictet-Spengler reactions were carried out between 3-carbomethoxy-2-(formylmethyl)-3-sulfolene and tryptamines. Without isolation, the products were converted with complete stereoselectivity into apoyohimbine derivatives, via sulfur dioxide extrusion followed by intramolecular Diels-Alder cyclisation. (C) 1997 Published by Elsevier Science Ltd.
A One-Pot Tandem Pictet-Spengler-Diels-Alder Synthesis of Apoyohimbines from 3-Carbomethoxy-2-(formylmethyl)-3-sulfolene
摘要:
Pictet-Spengler reactions were carried out between 3-carbomethoxy-2-(formylmethyl)-3-sulfolene and tryptamines. Without isolation, the products were converted with complete stereoselectivity into apoyohimbine derivatives, via sulfur dioxide extrusion followed by intramolecular Diels-Alder cyclisation. (C) 1997 Published by Elsevier Science Ltd.