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Construction of All-Carbon Quaternary Stereocenters by Zinc-Mediated Barbier-Type Allylation in AqueousMedia. -(TAKAO*, K.-I.; MIYASHITA, T.; AKIYAMA, N.; KURISU, T.; TSUNODA, K.; TADANO, K.-I.; Heterocycles 86 (2012) 1, 147-153, http://dx.doi.org/10.3987/com-12-s(n)31 ; Dep. Appl. Chem., Fac. Sci. Technol., Keio Univ., Kohoku, Yokohama 223, Japan; Eng.) -R. Staver

Furan derivatives R 0060Enantioselective Synthesis of a 3,5,5-Trialkylated Tetronic Acid Derivative. -A multi-step enantioselective procedureallows the synthesis of the tetronic acid derivative (XV) via Dieckmann condensation of ester (XI) as a key step. This approach realizes access to the tetronic acid moiety of the acylphloroglucinol-type natural product perforatumone. -(TAKAO*, K.-I.; KOJIMA, Y.; MIYASHITA, T.; YASHIRO, K.; YAMADA, T.; TADANO, K.-I.; Heterocycles 77 (2009) 1, 167-172; Dep. Appl.