从(Z)-十八烷基-2-烯-1-醇容易获得的(Z)-1-三氯乙二酰亚胺基氧基十八烷基-2-烯用N-碘代琥珀酰亚胺酰亚胺化,得到4-(1-碘十六烷基)-2-三氯甲基-。 4,5-二氢-恶唑。从该化合物中,两条路线被开发,无论是纯的(±) -赤型-sphinganine三乙酸酯纯或(±) -苏型分别-sphinganine三乙酸酯,。中性裂解4-(1-碘十六烷基)-2-三氯甲基-4,5-二氢-恶唑得到相应的酰胺,该酰胺通过用Amberlyst A 26(CO 3 2-形式)处理而得到顺式-4-羟甲基-5-十五烷基-2-三氯甲基-4,5-二氢-恶唑与少量顺式-2-羟甲基-3-十五烷基氮丙啶。恶唑水解并完全乙酰化后,以70%的收率获得(±)-赤型-鞘氨醇三乙酸酯。在另一方面中,4-(1- iodohexadecyl)的酸裂解恶唑2-氨基-3-碘-十八烷-1-醇盐酸盐,其直接用Amberlyst A
Asymmetric Synthesis of Sphinganine and Clavaminol H
作者:Ramzi Ait-Youcef、Xavier Moreau、Christine Greck
DOI:10.1021/jo1003899
日期:2010.8.6
An efficient enantioselective synthesis of sphinganine and clavaminolH is reported. These sphingoid-type bases were obtained from commercially available fatty acids using highly enantioselective Ru-catalyzed hydrogenation and organocatalytic electrophilic amination reactions to create the stereogenic centers.
An efficient methodology for the synthesis of sphingoid-type bases is reported. It involves the stereoselective addition of a racemic 3-alkoxy allenylzinc to enantiopure N-tert-butylsulfinyl imines and a cross-metathesis reaction as the key steps. It has been successfully applied to the syntheses of sphinganine and naturally occurring bioactive related compounds, among which the hydrolysis product
Preparation of <i>anti</i>-Vicinal Amino Alcohols: Asymmetric Synthesis of <scp>d</scp>-<i>erythro</i>-Sphinganine, (+)-Spisulosine, and <scp>d</scp>-<i>ribo</i>-Phytosphingosine
作者:Ewen D. D. Calder、Ahmed M. Zaed、Andrew Sutherland
DOI:10.1021/jo401211j
日期:2013.7.19
Overman rearrangement have been developed for the highly selective synthesis of anti-vicinal amino alcohol natural products. A MOM ether-directed palladium(II)-catalyzed rearrangement of an allylic trichloroacetimidate was used as the key step for the preparation of the protein kinase C inhibitor d-erythro-sphinganine and the antitumor agent (+)-spisulosine, whereas the Overman rearrangement of chiral
已经开发了 Overman 重排的两种变体,用于抗连位氨基醇天然产物的高选择性合成。MOM 醚导向钯 (II) 催化的烯丙基三氯乙酰亚胺重排被用作制备蛋白激酶 C 抑制剂d-赤型-二氢鞘氨醇和抗肿瘤剂 (+)-spisulosine的关键步骤,而 Overman 重排手性烯丙基trichloroacetimidates通过不对称还原的α产生,β不饱和甲基酮允许快速访问既d -核糖-phytosphingosine和升-阿拉伯-phytosphingosine。