... 1985 Pergamon Press Ltd. SYNTHESIS OF a,@-UNSATURATED BUTENOLIDES FROM ALLENIC ACIDS G. Bryon Gill* and Muhammad Sum Hj. Idris Department of Chemistry, The University, Nottingham, NG7 2RD, England. ... Page 4. 4814 Acknowledgements: MS I. thanks the Universiti Teknologi Malaysia for financial support. We are happy acknowledge the contributions of Janet Liston and Brian J. Veitch to this study via undergraduate project work. ...