This disclosure describes certain 11-hydroxy and 11-deoxy-9-keto(or hydroxy)-prostanoic acid derivatives useful as bronchodilators, hypotensive agents, anti-ulcer agents, or as intermediates.
Development of a Divergent Route to Erythrina Alkaloids
作者:Jesper L. Kristensen、Sebastian Clementson、Mikkel Jessing、Paulo J. Vital
DOI:10.1055/s-0039-1690792
日期:2020.3
our efforts towards the development of a divergentenantioselectivesynthesis of (+)-dihydro-β-erythroidine (DHβE) – one of the most prominent members of this intriguing family of natural products. 1 Introduction 2 Synthetic Strategy 2.1 First Generation 2.2 Second Generation 2.3 Third Generation 2.3.1 Radical Endgame 2.3.2 Completion of the TotalSynthesis 3 Conclusion
Behaviour of monocomplexed 1,4-diynes in the Khand reaction and use of ethylene equivalent techniques in a convenient route to tritium-labelled methyl jasmonate
作者:William J. Kerr、Mark McLaughlin、Peter L. Pauson
DOI:10.1016/s0022-328x(01)00890-7
日期:2001.7
1,2-Complexed hexacarbonyl(hepta-1,4-diyne)dicobalt, obtained from hexacarbonyl(propargyl acetate)dicobalt with tri-1-butynylaluminium, has been converted, by selective Khand annulation of the complexed triple bond with vinyl benzoate, to 2-pent-2-yn-1-ylcyclopent-2-en-1-one. By use of standard procedures this alkynyl cyclopentenone has been transformed into methyl jasmonate, allowing replacement of
This disclosure describes 3-triphenylmethoxy-1-alkynes, 3-triphenylmethoxy-1-trans-alkenyl-dialkyl-alanes, and lithium 3-triphenylmethoxy-1-trans-alkenyl-dialkyl alanates useful as intermediates for the preparation of certain 11-hydroxy- and 11-deoxy-9-keto(or hydroxy)-prostanoic acid derivatives which possess bronchodilator, hypotensive, and anti-ulcer activity.