Synthesis 2016; 48(02): 238-244
DOI: 10.1055/s-0035-1560809
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Benzotriazepine Derivatives via [4+3] Cycloaddition of Aza-o-quinone Methide Intermediates and Azomethine Imines

Ying Zhi
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   eMail: enders@rwth-aachen.de
,
Kun Zhao
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   eMail: enders@rwth-aachen.de
,
Tao Shu
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   eMail: enders@rwth-aachen.de
,
Dieter Enders*
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   eMail: enders@rwth-aachen.de
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Publikationsverlauf

Received: 02. Oktober 2015

Accepted: 05. Oktober 2015

Publikationsdatum:
05. November 2015 (online)


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Abstract

An efficient and unprecedented [4+3] cycloaddition between in situ generated aza-o-quinone methides and azomethine imines via an aza-Michael/aminalization sequence has been developed. The scalable protocol allows to expeditiously assemble a valuable heterocyclic system incorporating tetrahydroisoquinoline and benzotriazepine scaffolds in good to excellent yields under mild conditions.

Supporting Information