The synthesis of a fluorinated analogue of 5-aminolaevulinic acid, a potential inhibitor of porphyrin biosynthesis
作者:Finian J. Leeper、Martin Rock
DOI:10.1016/s0022-1139(00)80192-x
日期:1991.3
5-Amino-2-fluorolaevulinic acid 3 has been synthesized in high yield by modification of a new route to 5-aminolaevulinic acid (ALA), involving γ-lactone intermediates. Initial studies suggest that 3 is an inhibitor of ALA dehydratase, an early enzyme of tetrapyrrole biosynthesis.
Ester enolate Claisen rearrangements of allyl .alpha.-fluoroacetates and .alpha.-fluoropropanoates
作者:John T. Welch、Janet S. Plummer、Tso Sheng Chou
DOI:10.1021/jo00001a065
日期:1991.1
The ester enolate Claisen rearrangement of allyl alpha-fluoroacetates 1 forms 2-fluoroalkenoic acids 2 in good to excellent yield with good internal asymmetric induction. This selectivity was unexpected as stereoselective deprotonation of fluoroacetates is not normally possible. The selective formation of the required alpha-fluoro silyl ketene acetal 3 was found to result from the stereoselective rearrangement of the allyl alpha-fluoro-alpha-silylacetate isomer. Although silyl ketene acetals derived from alpha-fluoropropanoates 7 also rearranged, control of internal asymmetric induction was not possible.
Machleidt,H., Justus Liebigs Annalen der Chemie, 1964, vol. 676, p. 66 - 75
作者:Machleidt,H.
DOI:——
日期:——
Facile diastereoselective ester enolate Claisen rearrangements of allyl fluoroacetates
作者:John T. Welch、Janet S. Samartino
DOI:10.1021/jo00219a056
日期:1985.9
Synthesis of 5-[(Pentafluorosulfanyl)methyl]-γ-butyrolactones via a Silver-Promoted Intramolecular Cyclization Reaction
The synthesis of 5‐[(pentafluorosulfanyl)methyl]‐γ‐butyrolactones bearing different substituents at position 3 or 4 is reported. A silver‐promoted intramolecular cyclization of substituted 4‐chloro‐5‐(pentafluorosulfanyl)pentanoic acids allows the preparation of substituted SF5‐containing γ‐butyrolactones in up to 96 % yield.