The first synthesis of clusiparalicoline A, a prenylated and geranylated biphenyl compound isolated from the roots of Clusia paralicola, has been achieved by applying the sequential palladium-catalyzed Stille and Suzuki reactions to the formation of all the CC bonds on electron-rich arylbromide and triflate. Clusiparalicoline A has been found to exhibit a potent neurite outgrowth promoting activity
(±)-A80915G, a member of the napyradiomycin family of antibiotics, has been synthesized from 1-amino-2,5-dimethoxy-4-nitrobenzene via the sequential palladium-catalyzed cross-coupling reactions (the Stille reaction) of aryl halides with allyltins and the Diels-Alder reaction of the chloroquinone with the Danishefsky-Brassard diene.
Practical Stannylation of Allyl Acetates Catalyzed by Nickel with Bu<sub>3</sub>SnOMe
作者:Kimihiro Komeyama、Yuuhei Itai、Ken Takaki
DOI:10.1002/chem.201601515
日期:2016.6.27
A practical and scalable nickel‐catalyzed allylic stannylation of allyl acetates with Bu3SnOMe is described. A variety of acyclic and cyclic allyl acetates, even with base‐sensitive moieties, undergoes the stannylation by using NiBr2/4,4′‐di‐tert‐butylbipyridine (dtbpy)/Mn catalyst system to afford highly functionalized allyl stannanes with excellent regioselectivity and yields. Furthermore, the scope
Reversible stereocontrol in the Lewis acid promoted reaction of alkoxyaldehydes toward various allyltins
作者:Yutaka Nishigaichi、Akio Takuwa
DOI:10.1016/s0040-4039(02)02867-8
日期:2003.2
In the reactions of variously substituted allyltin reagents toward achiral alkoxyaldehydes, one of the diastereomeric homoallyl alcohols was stereoselectively obtained by the help of BF3, while TiCl4 preferentially gave the other diastereomer, though (E)- and (Z)-3-monoalkylallyltin reagents were exceptional. This reversible diastereoselectivity can be explained by the coordination geometry (anti or
Stereospecificity in the Lewis acid promoted allylation reaction of 3,3-disubstituted allyltins toward aldehydes
作者:Yutaka Nishigaichi、Akio Takuwa
DOI:10.1016/s0040-4039(98)80032-4
日期:1999.1
The Lewisacid-promotedreaction of 3,3-disubstituted allyltins towardaldehydes was found to be stereospecific; the (E)-reagent gave syn-products and the (Z)-one gave anti-products. This is in contrast to that of 3-mono-substituted congeners which are known to react syn-stereoselectively regardless of their double bond geometry. The reaction was assumed to proceed via an acyclic syn-synclinal transition