Conformations of three heterocyclic perhydro­pyrrolobenzo­furans and polymeric assembly via co-operative inter­molecular C—H⋯O hydrogen bonds

Yathirajan, H. S. and Narasegowda, R. S. and Lynch, D. E. and Narasimhamurthy, T. and Rathore, R. S. (2006) Conformations of three heterocyclic perhydro­pyrrolobenzo­furans and polymeric assembly via co-operative inter­molecular C—H⋯O hydrogen bonds. Acta Crystallographica Section C, 62 (5). o277-o280. ISSN 2053-2296

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Abstract

In 1-cyclo­hexyl-6,6,8a-trimethyl-3a,6,7,8a-tetra­hydro-1H-1-benzofuro[2,3-b]pyrrole-2,4(3H,5H)-dione, C19H27NO3, (I)[link], and the isomorphous compounds 6,6,8a-trimethyl-1-phenyl-3a,6,7,8a-tetra­hydro-1H-1-benzofuro[2,3-b]pyrrole-2,4(3H,5H)-dione, C19H21NO3, (II)[link], and 6,6,8a-trimethyl-1-(3-pyridyl)-3a,6,7,8a-tetra­hydro-1H-1-benzofuro[2,3-b]pyrrole-2,4(3H,5H)-dione, C18H20N2O3, (III)[link], the tetra­hydro­benzo–dihydro­furo–pyrrolidine ring systems are folded at the cis junction of the five-membered rings, giving rise to a non-planar shape of the tricyclic cores. The dihydro­furan and pyrrolidine rings in (I)[link] are puckered and adopt an envelope conformation. The cyclo­hexene rings adopt a half-chair conformation in all the mol­ecules, while the substituent N-cyclo­hexyl ring in (I)[link] assumes a chair form. Short intra­molecular C—H⋯O contacts form S(5) and S(6) motifs. The isomorphous compounds (II)[link] and (III)[link] are effectively isostructural, and aggregate into chains via inter­molecular C—H⋯O hydrogen bonds.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	06 Nov 2019 10:02
Last Modified:	06 Nov 2019 10:02
URI:	http://eprints.uni-mysore.ac.in/id/eprint/9855

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