(2Rs,3Sr)-Hex-5-Ene-1,2,3-Triol置于甲醇,臭氧体系中,化学反应 0.5H,反应生成 2-脱氧-Alpha-L-赤式吡喃糖,2-脱氧-Beta-L-赤式戊呋喃糖,2-脱氧-Alpha-L-赤式戊呋喃糖,2-脱氧-D-阿拉伯吡喃糖
参考文献:Synthesis Of Sn-1 Functionalized Phospholipids As Substrates For Secretory Phospholipase A2
标题:Synthesis Of Sn-1 Functionalized Phospholipids As Substrates For Secretory Phospholipase A2
摘要:Secretory Phospholipase A2 (Spla2) Represents A Family Of Small Water-Soluble Enzymes That Catalyze The Hydrolysis Of Phospholipids In The Sn-2 Position Liberating Free Fatty Acids And Lysophospholipids. Herein We Report The Synthesis Of Two New Phospholipids (1 And 2) With Bulky Allyl-Substituents Attached To The Sn-1 Position Of The Glycerol Backbone. The Synthesis Of Phospholipids 1 And 2 Is Based Upon The Construction Of A Key Aldehyde Intermediate 3 Which Locks The Stereochemistry In The Sn-2 Position Of The Final Phospholipids. The Aldehyde Functionality Serves As The Site For Insertion Of The Allyl-Substituents By A Zinc Mediated Allylation. Small Unilamellar Liposomes Composed Of Phospholipids 1 And 2 Were Subjected To Spla2 Activity Measurements. Our Results Show That Only Phospholipid 1 Is Hydrolyzed By The Enzyme. Molecular Dynamics Simulations Revealed That The Lack Of Hydrolysis Of Phospholipid 2 Is Due To Steric Hindrance Caused By The Bulky Side Chain Of The Substrate Allowing Only Limited Access Of Water Molecules To The Active Site.
DOI:10.1016/j.Chemphyslip.2006.12.006