Synthetic Communications, , vol. 20, # 3 p. 355 - 364 Synthetic Communications, , vol. 20, # 5 p. 693 - 701 Indian Journal of Chemistry - Section B Organic Chemistry Including Medicinal Chemistry, , vol. 29, # 8 p. 778 - 780 Synthetic Communications, , vol. 21, # 3 p. 319 - 325 Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, , vol. 35, # 8 p. 835 - 837