... Financial support from the Department of Chemistry and Biochemistry of Queens College is gratefully acknowledged. ... Heterocyclic Chenu, 12, 103 (1970); [с] H. Bredereck, R. Gompper, HG Schuh and G. Theilig,/tn£«w ... [2] AM Van Leusen, J. Wildemam and OH Oldenziel, J. Org. ...