γ-butyrolactone, an alternative source of chiral iodo derivatives.
摘要:
An efficient synthesis of (3S) 1,3-di-tert-butyldimethylsilyloxy-6-iodohexane, a chiral iodo derivative useful for the preparation of functionalised 1,7-dioxaspiro[5.5]undecanes from gamma-butyrolactone is described.
A total synthesis of the Annonaceous acetogenin mucocin has been accomplished. The synthesis follows a convergent strategy, wherein at a very late stage the left part of the molecule is connected with the right part. The key reaction is the stereocontrolled addition of an organomagnesium compound 2 to the aldehyde 3. The THP ring of mucocin is build by a 6-endo epoxide cyclization of an epoxyacetonide