Further reactions of t-butyl 3-oxobutanthioate and t-butyl 4-diethyl-phosphono-3-oxobutanthioate : Carbonyl coupling reactions, amination, use in the preparation of 3-acyltetramic acids and application to the total synthesis of fuligorubin A.
作者:Steven V. Ley、Stephen C. Smith、Peter R. Woodward
DOI:10.1016/s0040-4020(01)88210-7
日期:1992.1
for the preparation of homologated derivatives suitable for amination in the presence of silver (I) trifluoroacetate to afford the corresponding β-ketoamides is discussed. In particular Wadsworth-Emmons coupling reactions of (2) with various carbonyl compounds gave good yields of E-substituted products. Many of the β-ketoamides were shown to be suitable precursors for 3-acyltetramic acids using a Dieckmann
The conversion of polyconjugated aldehydes or alcohols into their corresponding acids was carried out using Acetobacter aceti. The analytical results were compared with those of the acids chemically obtained using a Horner–Wittig reaction.
Double Diels−Alder Reactions of Linear Conjugated Tetraenes
作者:Craig I. Turner、Michael N. Paddon-Row、Anthony C. Willis、Michael S. Sherburn
DOI:10.1021/jo048108a
日期:2005.2.1
explanation of unexpectedly high π-diastereofacial selectivities witnessed during these transformations, through the identification of preferred C1−C* dieneconformations and nonbonded interactions. These new experimental and computational findings encourage the use of linear conjugated polyenes in domino sequences.
Polyunsaturated linear aldehydes and their derivatives with anti-radical and anti-tumoral activity
申请人:Stradi Riccardo
公开号:US20050175555A1
公开(公告)日:2005-08-11
The invention relates to polyunsaturated linear aldehydes and derivatives thereof which can be extracted from the feathers or tissues of parrots of prepared synthetically with antioxidant, antitumoral and anti-inflammatory activity, and which are useful in the prevention and treatment of cardiovascular, inflammatory, atherosclerotic, proliferative cell and tumour damage and the prevention of alterations caused by ageing.