Synthesis 2014; 46(18): 2471-2480
DOI: 10.1055/s-0034-1378280
paper
© Georg Thieme Verlag Stuttgart · New York

Design and Synthesis of Angularly Annulated Spirocyclics via Enyne Metathesis and the Diels–Alder Reaction as Key Steps

Sambasivarao Kotha*
Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India   Fax: +91(22)25727152   eMail: srk@chem.iitb.ac.in
,
Rashid Ali
Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India   Fax: +91(22)25727152   eMail: srk@chem.iitb.ac.in
,
Arti Tiwari
Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India   Fax: +91(22)25727152   eMail: srk@chem.iitb.ac.in
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Publikationsverlauf

Received: 12. Februar 2014

Accepted after revision: 15. Mai 2014

Publikationsdatum:
25. Juni 2014 (online)


Abstract

We have developed a simple and an efficient route to a range of angularly fused spirocycles by the application of enyne metathesis and the Diels–Alder reaction as key steps. The enyne metathesis protocol has been further extended to the dibenzylation of indane-1,3-dione by using cross-enyne metathesis in the presence of hexa-1,5-diene with the aid of Grubbs’ 1st generation catalyst followed by an aromatization sequence with DDQ.

Supporting Information