Regioselective Trapping of Terminal Di-, Tri-, and Tetraynes with Benzyl Azide
摘要:
The reaction of benzyl azide with terminal di-, tri-, and tetraynes appended with a range of functional groups has been explored. Standard reaction conditions for BnN3 catalyzed by CuSO(4)(.)5H(2)O gave alkynyl, butadiynyl, and hexatriynyl triazoles in moderate to good yields. The reaction proceeds regioselectively as determined by the X-ray crystallographic analysis of three derivatives (1c, 1d, and 3c), and no evidence of multiple azide addition to the polyyne framework is observed.
Natural acetylenes. Part XVIII. Some allenic polyacetylenes from basidiomycetes
作者:R. E. Bew、J. R. Chapman、Ewart R. H. Jones、B. E. Lowe、G. Lowe
DOI:10.1039/j39660000129
日期:——
The isolation, characterisation, and structure determination of ten polyacetylenes, including seven new allenic-diactylenes, from five Basidiomycete fungi (Cortinellus berkeleyanus, Odontia bicolor, Flammula sapinea, Daedalea juniperina, and the unidentified fungus B285) are described. The new allenic-diacetylenes are (a) HCC·CC·CHCCH·[CH2]n·OH (n= 1, 3, and 4); (b) HCC·CC·CHCCH·CH(OH)·[CH2]n·OH (n=
描述了十种聚乙炔的分离,表征和结构测定,其中包括五种担子菌(Cortinellus berkeleyanus,Odontia bicolor,Flamula sapinea,Daedalea juniperina和未鉴定的真菌B285)中的十种聚乙炔,其中包括七种新的烯丙基二乙炔。新的烯丙基二乙炔为(a)HC C·C C·CH C CH·[CH 2 ] n ·OH(n = 1、3和4);(b)HC C·C C·CH C CH·CH(OH)·[CH 2 ] n ·OH(n = 2和3);(c)HC C·C C·CH C CH·CH 2 ·CH(OH)·CH 2 ·CH2 ·OH;(d)CH 3 ·CC·CC·CHCCH·CH 2 ·CH 2 ·OH。方便地纯化二醇(b; n = 2)和(c),并检查它们的异亚丙基衍生物。
Synthesis and Stability of a Homologous Series of Triynol Natural Products and Their Analogues
作者:Thanh Luu、Rik R. Tykwinski
DOI:10.1021/jo061588g
日期:2006.11.1
A series of polyyne natural products 1, 13, and 31 and analogues 14, 21, and 22 are synthesized in six steps. The key step is a Fritsch-Buttenberg-Wiechell rearrangement in which a triyne framework is formed from the appropriate dibromoolefin precursor. Terminal conjugated triynes 13 and 14 are obtained as highly unstable products that rapidly decompose under ambient conditions. The stability of triynols increases via either the addition of methylene units (i.e., 6 -> 31 -> 1) or addition of terminal substituents (i.e., 13 -> 21 or 31).
Bendz, Arkiv foer Kemi, 1959, vol. 14, p. 475,479
作者:Bendz
DOI:——
日期:——
Bohlmann,F. et al., Chemische Berichte, 1961, vol. 94, p. 948 - 957
作者:Bohlmann,F. et al.
DOI:——
日期:——
Regioselective Trapping of Terminal Di-, Tri-, and Tetraynes with Benzyl Azide
作者:Thanh Luu、Robert McDonald、Rik R. Tykwinski
DOI:10.1021/ol062522a
日期:2006.12.1
The reaction of benzyl azide with terminal di-, tri-, and tetraynes appended with a range of functional groups has been explored. Standard reaction conditions for BnN3 catalyzed by CuSO(4)(.)5H(2)O gave alkynyl, butadiynyl, and hexatriynyl triazoles in moderate to good yields. The reaction proceeds regioselectively as determined by the X-ray crystallographic analysis of three derivatives (1c, 1d, and 3c), and no evidence of multiple azide addition to the polyyne framework is observed.