Synthesis 2017; 49(08): 1816-1833
DOI: 10.1055/s-0036-1588925
paper
© Georg Thieme Verlag Stuttgart · New York

Sequential Tandem Transformations of Functionalized Diazanorbornenes: Facile Strategy towards Pentacyclic Frameworks with Multiple Stereocenters

P. Preethanuj
a   Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India
,
V. Jijitha
a   Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India
,
Ajesh Vijayan
a   Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India
b   Academy of Scientific and Innovative Research (AcSIR), New Delhi, India   eMail: radhu2005@gmail.com
,
Jubi John
a   Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India
b   Academy of Scientific and Innovative Research (AcSIR), New Delhi, India   eMail: radhu2005@gmail.com
,
K. V. Radhakrishnan*
a   Organic Chemistry Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695 019, India
b   Academy of Scientific and Innovative Research (AcSIR), New Delhi, India   eMail: radhu2005@gmail.com
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Publikationsverlauf

Received: 31. Oktober 2016

Accepted after revision: 01. Dezember 2016

Publikationsdatum:
30. Dezember 2016 (online)


Abstract

The design, synthesis, and comprehensive utilization of diazanorbornene systems incorporating a flexible hydroxy group are described. The Lewis acid catalyzed intramolecular rearrangement of these strained alkenes gave cyclopentannulated dihydro-2H-pyrans, whereas the intermolecular sequential Lewis acid/palladium-mediated reaction with o-iodoanilines gave pentacyclic frameworks through multiple bond formation (C–C, C–N, C–O).

Supporting Information