7-Meth-oxy-penta-cyclo-[5.4.0.02,6.03,10.05,9]undec-ane-8,11-dione

Sambasivarao Kotha; Saima Ansari; Subba Rao Cheekatla

doi:10.1107/S2414314620013802

7-Meth-oxy-penta-cyclo-[5.4.0.0^2,6.0^3,10.0^5,9]undec-ane-8,11-dione

IUCrdata. 2020 Oct 20;5(Pt 10):x201380. doi: 10.1107/S2414314620013802. eCollection 2020 Oct.

Authors

Sambasivarao Kotha¹, Saima Ansari¹, Subba Rao Cheekatla¹

Affiliation

¹ Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai - 400076, India.

Abstract

The structure of 7-meth-oxy-penta-cyclo-[5.4.0.0^2,6.0^3,10.0^5,9]undecane-8,11-dione, C₁₂H₁₂O₃, at 150 K has monoclinic (P2₁/c) symmetry. The penta-cyclo-undecane cage compound is composed of four five-membered rings, a planar four-membered ring and a six-membered ring in a boat conformation fused into a closed strained-cage framework. All of the five-membered rings adopt an envelope conformation.

Keywords: Diels–Alder reaction; crystal structure; intramolecular [2 + 2] photocycloaddition; pentacyclo [5.4.0.02,6.03,10.05,9]undecane.

Grants and funding

Funding for this research was provided by: Department of Science and Technology, Ministry of Science and Technology, J C Bose Fellowship (award No. SR/S2/JCB-33/2010 to Prof. Sambasivarao Kotha); Defence Research and Development Organisation (grant No. ARDB/01/1041849/M/1 to Prof. Sambasivarao Kotha); University Grants Commission (scholarship to Saima Ansari, Subba Rao Cheekatla).