Efficient Synthesis of 3-Aminocyclobut-2-en-1-ones: Squaramide Surrogates as Potent VLA-4 Antagonists
摘要:
[GRAPHICS]A novel series of uniquely functionalized 3-aminocyclobut-2-en-1-ones has been prepared by facile condensation of a variety of cyclobuta-1,3-diones with a phenylalanine-derived primary amine. These systems subsequently lend themselves to substitution at C-2 by reaction with a variety of electrophilic reagents including N-halosuccinimides, sulfenyl chlorides, and Eschenmoser's salt. Compounds from this novel series are potent antagonists of VLA-4.
Efficient Synthesis of 3-Aminocyclobut-2-en-1-ones: Squaramide Surrogates as Potent VLA-4 Antagonists
摘要:
[GRAPHICS]A novel series of uniquely functionalized 3-aminocyclobut-2-en-1-ones has been prepared by facile condensation of a variety of cyclobuta-1,3-diones with a phenylalanine-derived primary amine. These systems subsequently lend themselves to substitution at C-2 by reaction with a variety of electrophilic reagents including N-halosuccinimides, sulfenyl chlorides, and Eschenmoser's salt. Compounds from this novel series are potent antagonists of VLA-4.
Enantioselective Hydrofunctionalization of Cyclobutenones: Total Synthesis of gem‐Dimethylcyclobutane Natural Products
作者:Shaowei Wang、Changxu Zhong、Yingchao Huang、Ping Lu
DOI:10.1002/anie.202400515
日期:2024.5.13
A sequential enantioselective reduction/trapping/cross-coupling reaction of cyclobutenones furnished an array of chiral trans-2,3-disubstituted-4,4-disubstituted cyclobutanones. The developed strategy was applied in the syntheses of several gem-dimethylcyclobutane-containing natural products, including (+)-β-caryophyllene, (−)-rumphellanones A−C, (−)-1β,9αH-5-linoleoyloxy-4,5-secocaryophyllen-4-one
环丁烯酮的连续对映选择性还原/捕获/交叉偶联反应提供了一系列手性反式-2,3-二取代-4,4-二取代环丁酮。该策略应用于多种含偕二甲基环丁烷的天然产物的合成,包括(+)-β-石竹烯、(−)-rumphelanones A−C、(−)-1β,9α H -5-linoleoyloxy-4 ,5-仲石竹烯-4-酮和(-)-莱科维醛。
Melaimi, Mohand; Parameswaran, Pattiyil; Donnadieu, Bruno, Angewandte Chemie - International Edition, 2009, vol. 48, p. 4792 - 4795
作者:Melaimi, Mohand、Parameswaran, Pattiyil、Donnadieu, Bruno、Frenking, Gernot、Bertrand, Guy