A Short Route to (±)-<i>N</i>-Hydroxylysine and (±)-Laminine by Palladium-Catalyzed Reactions
作者:Jean Pierre Genet、Serge Thorimbert、Sergio Mallart、Nathalie Kardos
DOI:10.1055/s-1993-25858
日期:——
The title compounds were conveniently synthesized by efficient sequential one-pot amination-alkylation starting from (Z)-4-acetoxy-2-butenyl ethyl carbonate (3) with tert-butyl (tert-butoxycarbonyloxy)carbamate, dimethylamine and methyl (diphenylmethyleneamino) acetate. Hydrogenation and hydrolysis of the 1,4-adducts afforded N 6-hydroxylysine [2-amino-6-(hydroxyamino)hexanoic acid, 1) and laminine hydrochloride [2-amino-6-(trimethylammonio)hexanoic acid chloride, 2] in 65 % and 39 % yield, respectively.
Palladium-catalyzed reaction of allyl esters with (N,O)-bis-ter-Boc hydroxylamine 2 gives protected N-allylhydroxylamines. A synthetic application to (+)-N6-hydroxylysine component of mycobactin T is also described.
Palladium(O)-catalyzed substitution of allylic substrates in an aqueous-organic medium
作者:Errol Blart、Jean Pierre Geneˆt、Mohamed Safi、Monique Savignac、Denis Sinou
DOI:10.1016/s0040-4020(01)80772-9
日期:1994.1
A palladium(0)-water soluble catalyst prepared in situ from palladium acetate and the sulfonated triphenyl phosphine P(C6H4-m-SO3Na)(3) (or tppts) is an efficient catalyst for allylic substitution with various carbon and heteronucleophiles in an aqueous-organic medium, allowing a very easy separation of the product(s) and the recycling of the catalyst.