Five-membered cyclic ethers often do not show strong thermodynamic preferences. High diastereocontrol can, however, be achieved. Epoxy alkynes such as 1 can be prepared in high ee bySharpless epoxidation. Buy5-Azaspirooctane-6,8-dione…
A variety of effective strategies for catalytic enantioselective ring construction have recently been developed. The simplest approach is to start with a prochiral ring. Yian Shi of Colorado State University…
Ive therapy solutions for patients with osteopenia. Indeed, drug therapy can be a dominant method against no therapy for girls with osteopenia who’re older than 65 years. The truth that…
Ficreports/Figure five. iDPSCs mimic the pharmacological response of DP cells to minoxidil sulfate. (a) Schematic illustrating the experimental procedure along with a pathological image of human hair follicle bulb. A…
Most methods for C-C bond formation involve the coupling of two already-functionalized carbons. Michael P. Doyle of the University of Maryland has developed (J. Am. Chem. Soc. (S)-2-Azido-3,3-dimethylbutanoic acid web…
One of the simplest ways to establish an enantiomerically-pure ternary center is to selectively hydrogenate a trisubstituted alkene. While there are many examples of the enantioselective reduction of more highly…
Direct conversion of an unactivated C-H bond to a C-O, C-N or C-C bond is a powerful way to add valuable complexity to a substrate. While this is by no…
While alkene metathesis has become part of the toolkit of organic synthesis, investigators around the world are pushing the limits of the method as they employ the reaction in total…
Several creative new approaches to carbocyclic ring construction using transition metals have recently been reported. Dichlorocyclopropanes such as 1 are easily prepared by the addition of dichlorocarbene to the corresponding…
A recent publication by G. Barbarella and co-workers from Bologna, Italy (J. Org. Chem. 2004, 69, 4821.DOI: 10.1021/jo035723q)reports the rapid preparation of poorly soluble unsubstituted and modified α-quinque and sexithiophenes…
Chemexpress