The first stereoselective total synthesis of a new antitumour and anti-inflammatory neolignan, surinamensinol A
作者:Parigi Raghavendar Reddy、Biswanath Das
DOI:10.1039/c3ra45419c
日期:——
The stereoselective total synthesis of an antitumour and anti-inflammatory 8-O-4′-neolignan, surinamensinol A has been accomplished starting from two aldehydes, 3,4,5-trimethoxy benzaldehyde and vanillin. The key steps involve an asymmetric reduction using a chiral oxazaborolidine complex, a Sharpless asymmetric dihydroxyllation and a Mitsunobu reaction. This is the first report of the total synthesis
抗肿瘤和抗炎的8- O -4'-新木质素,苏人薄荷醇A的立体选择性全合成已经从两种醛,即3,4,5-三甲氧基苯甲醛和香兰素开始。关键步骤包括使用手性恶唑硼烷配合物进行不对称还原,Sharpless不对称二羟基化反应和Mitsunobu反应。这是surinamensinol A全合成的首次报道。
Modular Synthesis and Biological Investigation of 5-Hydroxymethyl Dibenzyl Butyrolactones and Related Lignans
作者:Samuel J. Davidson、Lisa I. Pilkington、Nina C. Dempsey-Hibbert、Mohamed El-Mohtadi、Shiying Tang、Thomas Wainwright、Kathryn A. Whitehead、David Barker
DOI:10.3390/molecules23123057
日期:——
Dibenzyl butyrolactone lignans are well known for their excellent biological properties, particularly for their notable anti-proliferative activities. Herein we report a novel, efficient, convergent synthesis of dibenzyl butyrolactone lignans utilizing the acyl-Claisen rearrangement to stereoselectively prepare a key intermediate. The reported synthetic route enables the modification of these lignans to
二苄基丁内酯木脂素以其优异的生物学特性而闻名,特别是其显着的抗增殖活性。在此,我们报告了一种利用酰基-克莱森重排立体选择性制备关键中间体的二苄基丁内酯木脂素的新型、高效、会聚合成。报道的合成路线能够修饰这些木脂素以产生这些木脂素的 5-羟甲基衍生物。评估了这些类似物的生物活性,其衍生物显示出优异的细胞毒性特征,导致 Jurkat T 白血病细胞程序性细胞死亡,其中不到 2% 的孵育细胞进入坏死细胞死亡途径。
Synthesis of phenolic components of Grains of Paradise
t-5-en-4-one (1) and 4-[3-hydroxydecyl]-2-methoxyphenol (2), isolated from the dried seeds of Grains of Paradise (Aframomum melegueta), were synthesized; the latter compound was made as the S-enantiomer and the material derived from the seeds was found to be a 1:1.7 mixture of the R and S isomers. The synthetic route used should allow the preparation of analogs having extended alkyl chains and consequently
The firstconcisestereoselective total synthesis of diarylheptanoid rhoiptelolC (1) was achieved from readily available vanillin. The synthesis involves Keck's asymmetric allylation, olefin cross metathesis, and Sharpless asymmetric dihydroxylation reaction as key steps.