作者:Gregory J. Hollingworth、Alexandre M. E. Richecoeur、Joseph Sweeney
DOI:10.1039/p19960002833
日期:——
The palladium-catalysed cross-coupling reaction of 4-tributylstannylfuran-2(5H)-one 3 with 1-iodo-4-methylpent-3-en-1-yne 4a gives the natural product cleviolide; from this substance may be prepared both (Z)- and (E)-isomers of scobinolide.
Synthesis and Some Chemical Transformations of Allylacetylenic 1,3-Dioxane Derivatives
作者:M. I. Shatirova、L. I. Gadzhiyeva
DOI:10.1134/s107036322006002x
日期:2020.6
AbstractA procedure has been proposed for the synthesis of allylacetylenic 1,3-dioxane derivatives by condensation of allylacetylenic glycols with formaldehyde in the presence of 40% sulfuric acid. The obtained compounds have been subjected to hydrosilylation, [2+1]- and [4+2]-cycloadditions, dehydrohalogenation, aminomethylation, and condensation to produce new 1,3-dioxane derivatives.
Mild, efficient, and clean! Six‐membered cyclic products including diiodocyclohexadiene and 2,3‐diiodobenzene have been prepared in a iodonium‐induced internal carbocyclization of hydroxylatedenynes (see scheme). This reaction proceeds smoothly under mild reaction conditions, and all the halogen atoms (I and Br) generated from the electrophiles are used effectively.