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No abstract

[9] 3 : Pale yellow crystals, [all,, MeOH); CI) (MeOH). Acl,= -1.33, ACW= -0.91; UV (MeOH): L,,,,x(lgc)= 241 ( 3 67). 277 nm (3.87); 'H-NMR ([Dolacetone): 6 = 1.89 and 2.09 (each m: 2 6-H), 2.38 ( s ; 3 10-H), 2.46 (m; 2 7-H), 3.61 ( s ; OCH2), 3.95 (m: 5-H). 7.80 (br. s ; NH), 7.95 (br. s ; OH).

gemischten Assoziats mit n-Butyllithium, wonach wieder aus sterischen Griinden ein ortho-Wasserstoffatom abgelast wird. 2,2'-DilithiobiphenyI sollte nach unseren MNDO-Berechnungen wegen intramolekularer Assoziation deutlich stabilisiert sein; durch eine R6ntgenstrukturanalyse haben wir unsere Voraussage, da8 die beiden Lithiumatome die Stellungen 2 und 2' symmetrisch iiberbriicken, bestatigen k6nnen2).

The volatile constituents of the tamarillo fruit (Cyphomandra betacea Sendtn.) pulp were obtained by liquidliquid extraction using pentane-dichloromethane mixture (2: 1, vlv). In total, 46 components were identified by HRGC and HRGC-MS analysis. Among them, methyl hexanoate, (E)-hex-Zenal, (Z)-hex-3-en-l-ol, eugenol and 4-allyl-2,6-dimethoxyphenol were found to be the major constituents. Chirospecific MDGC analysis revealed the presence of racemic mixtures both of butan-2-01 and methyl 3-hydroxybutanoate. For ethyl 3-hydroxybutanoate, methyl 3-hydroxyhexanoate and ethyl 3-hydroxyhexanoate enantiomeric distributions of 68:32%, 73:27%, and 63:37%, each of (S):(R), respectively, were determined. For a-terpineol and 4-terpineol enantiomeric excesses of 76% (S) and 48% ( R ) , respectively, were found.