Selective isomerisation of prop-2-yn-1-ols into α,β-unsaturated aldehydes catalysed by Ru[η3-CH2C(Me)CH2]2(Ph 2PCH2CH2PPh2)
作者:Michel Picquet、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1039/a701495c
日期:——
The complex
Ru[η
3
-CH
2
C(Me)CH
2
]
2
(Ph
2
PCH
2
CH
2
PPh
2
) is an efficient
catalyst precursor for the isomerisation of prop-2-yn-1-ols into
conjugated enals under mild conditions in the presence of benzoic acid
via (Z)-3-hydroxyprop-1-en-1-yl benzoates.
The first totalsyntheses of asperchalasines A–E, a collection of unprecedented merocytochalasans, are reported. Aspochalasin B, a key tricyclic cytochalasan monomer, was first synthesized through a unified approach that hinges on a Diels–Alder reaction and a ring‐closing metathesis reaction. The bioinspired Diels–Alder reactions of aspochalasin B with different epicoccine precursors were then explored