Gurjar, Mukund K.; Joshi, Ramesh A.; Chaudhuri, Siddhartha R.; Joshi, Shreerang V.; Barde, Anup R.; Gediya, Lalji K.; Ranade, Prasad V.; Kadam, Suresh M.; Naik, Sanjay J. Tetrahedron Letters, 2003 , vol. 44, # 26 p. 4853 - 4855