A method for the synthesis of bis-tetrahydrofuranyl annonaceous acetogenins, including the natural products and analogs thereof, is provided which proceeds by the Pd-mediated coupling of a bis-tetrahydrofuranyl-subunit comprising a terminal alkyne, with a (C4)-hydroxybutenolide subunit comprising a terminal vinyl iodide, followed by selective reduction of the resulting enyne.
Stereocontrolled synthesis of 2,5-linked bistetrahydrofurans via the triepoxide cascade reaction
作者:Thomas R. Hoye、Joseph C. Suhadolnik
DOI:10.1016/s0040-4020(01)90574-5
日期:1986.1
A complementary set of stereochemically controlled approaches to the preparation of twelve diastereomers of the bistetrahydrofurans 11 is described. The key transformation involves a series of nucleophilic displacement reactions within triepoxides 19-the “end-to-end” triepoxide cascade reaction—which leads, presumably via 22 and 23, after acetylation to bistetrahydrofuran tetraacetates 24. The “inside-out”
HOYE T. R.; SUHADOLNIK J. C., TETRAHEDRON, 42,(1986) N 11, 2855-2862
作者:HOYE T. R.、 SUHADOLNIK J. C.
DOI:——
日期:——
ICE RELEASE COATINGS
申请人:WYNNE Kenneth J.
公开号:US20160215167A1
公开(公告)日:2016-07-28
A compound is provided, having the formula (I), wherein R
S
is a soft block polymer; wherein each T is independently a urethane or urea linkage; see formulae (A) and (B); wherein each R
D
is independently —CH
3
, —CH
2
CH
3
, —CH
2
CH
2
CH
3
, or —CH
2
CH
2
CH
2
CH
3
; wherein each R′
D
is independently —CH
3
, —CH
2
CH
3
, —CH
2
CH
2
CH
3
, —CH
2
CH
2
CH
2
CH
3
, or —OR
D
; and wherein each p is independently 1, 2, or 3. Compositions containing the compound, and methods of making and using the compound are provided.