Gold(I)‐Catalyzed Ring‐Closing Alkyne‐Carbonyl Metathesis for the Synthesis of Butenolides
作者:Zhenjie Su、Pathan Mosim Amin、Shaozhong Wang
DOI:10.1002/chem.202302044
日期:2023.11.21
A gold(I)-catalyzed ring-closing alkyne-carbonyl metathesis has been developed to construct γ-butenolides and related naturally occurring compounds, featuring the concurrent formation of a carbon-carbon double bond and a ketone group in 100 % atom economy.
Five new lactone derivatives from the stems of Dendrobium nobile
作者:Xue-Ming Zhou、Cai-Juan Zheng、Jia-Ting Wu、Guang-Ying Chen、Jun Chen、Chong-Ge Sun
DOI:10.1016/j.fitote.2016.10.002
日期:2016.12
Five newlactone derivatives decumbic acids A and B (1 and 2), (-)-decumbic acid (3a), (-)- and (+)-dendrolactone (4a and 4b) together with four known compounds (3b and 5-7) were isolated from the stems of Dendrobium nobile. Their structures were elucidated using comprehensive spectroscopic methods. Compounds 3a and 3b, 4a and 4b were isolated as two pair of enantiomers by chiral HPLC. The absolute