Synthesis 2016; 48(03): 387-393
DOI: 10.1055/s-0035-1561285
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Angularly Fused (Homo)triquinane-Type Hydantoins as Precursors of Bicyclic Prolines

Biljana Šmit*
a   Faculty of Science, University of Kragujevac, Radoja Domanovića 12, P. O. Box 60, 34000 Kragujevac, Serbia   Email: biljam@kg.ac.rs
,
Marko Rodić
b   Faculty of Science, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
,
Radoslav Z. Pavlović*
c   Faculty of Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, Serbia   Email: radechem@gmail.com
› Author Affiliations
Further Information

Publication History

Received: 17 September 2015

Accepted after revision: 17 November 2015

Publication Date:
15 December 2015 (online)


Dedicated to Professor Aleksandar V. Teodorović with sentiments of gratitude and respect

Abstract

An efficient strategy for a four-step synthesis of angularly fused tricyclic hydantoins as suitable precursors of cis-fused bicyclic α-amino acids is developed by combining a highly diastereoselective Bucherer–Bergs reaction of 2-alkenylcycloalkanones and a regiospecific selenium-induced closure of pyrrolidine ring. This methodology was applied in a five-step synthesis of bicycloproline derivatives in high overall yield. The method could be used for the multigram preparation of free conformationally constrained bicyclic α-amino acids with two points of diversity (size of cycloalkyl ring and substituent at the pyrrolidine ring).

Supporting Information