57371-44-5Relevant articles and documents
First Enantioselective Synthesis of Surinamensinol B and a Non-Natural Polysphorin Analogue by a Two-Stereocentered Hydrolytic Kinetic Resolution
Lalwani, Komal G.,Sudalai, Arumugam
, p. 7344 - 7351 (2015/11/25)
An efficient and economical approach to the synthesis of antitumor and anti-inflammatory surinamensinol B (1) and antimalarial polysphorin analogue 2 has been achieved with high enantiomeric purity (96 % ee) by starting from commercially available 3,4,5-trimethoxybenzaldehyde. The key steps of the strategy include a Co-catalyzed two-stereocentered hydrolytic kinetic resolution (HKR) of racemic 2-[(methoxymethoxy)(3,4,5-trimethoxyphenyl)methyl]oxirane (13) as the chiral inducing step followed by a Mitsunobu reaction. Chiral epoxide 14 and chiral diol 15 were utilized in the syntheses of both compounds.
The first stereoselective total synthesis of a new antitumour and anti-inflammatory neolignan, surinamensinol A
Reddy, Parigi Raghavendar,Das, Biswanath
, p. 7432 - 7434 (2014/02/14)
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 of surinamensinol A.
Palladium hydroxide catalyzed transformation of primary propargylic alcohols into aldehydes: Application to the synthesis of the tetrahydrofuran core
Sabitha, Gowravaram,Reddy, A.Yagundar,Nayak, Sambit,Yadav, Jhillu S.
experimental part, p. 1657 - 1662 (2012/07/03)
A palladium-catalyzed one-pot, two-step sequence involving redox isomerization/reduction of primary propargylic alcohols into the corresponding aldehydes has been achieved at room temperature for the first time in good to excellent yields under mild conditions. The functional group compatibility in this reaction is studied and this new methodology has been successfully applied in the synthesis of the 2,5-trans-tetrahydrofuran ring system of amphidinolides. It is noteworthy that aromatic substituted propargylic alcohols gave a mixture of unsaturated and saturated aldehydes, whereas aliphatic propargylic alcohols gave only saturated aldehydes. Georg Thieme Verlag Stuttgart · New York.
Synthesis of gingerol and diarylheptanoids
Sabitha, Gowravaram,Srinivas, Chitti,Reddy, Teega Rammohan,Yadagiri, Kurra,Yadav, Jhillu Singh
experimental part, p. 2124 - 2133 (2012/03/27)
The synthesis of gingerol 1 and related compounds 2-5 along with diarylheptanoids 6-8 has been accomplished using a Keck allylation, Crimmins' aldol reaction, aldehyde coupling with acetylene, and chelation controlled reductions as the key reactions. The absolute configuration of these molecules was confirmed by preparing their acetonide derivatives and by comparison of the NMR data with natural compounds.
Heterocyclic compounds, their production and use
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, (2008/06/13)
Heterocyclic compounds represented by the general formula (I) wherein R stands for an optionally substituted aromatic heterocyclic group; X stands for oxygen atom, an optionally oxidated sulfur atom, —C(═O)— or —CH(OH)—; Y stands for CH or N; m denotes an integer of 0 to 10: n denotes an integer of 1 to 5: cyclic group ?stands for an optionally substituted aromatic azole group; and ring A is optionally further substituted, or salts thereof. The compound (I) possesses action of inhibiting tyrosine kinase and useful as antitumor agents.
Intramolecular regioselective insertion into unactivated prochiral carbon-hydrogen bonds with diazoacetates of primary alcohols catalyzed by chiral dirhodium(II) carboxamidates. Highly enantioselective total synthesis of natural lignan lactones
Bode,Doyle,Protopopova,Zhou
, p. 9146 - 9155 (2007/10/03)
Intramolecular insertion into unactivated prochiral C-H bonds of 3-aryl-1-propyl diazoacetates catalyzed by dirhodium(II) tetrakis[methyl 1-(3-phenyl propanoyl)imidazolidin-2-one-4(R or S)-carboxylate], Rh2(4R-MPPIM)4 or Rh2(4S-MPPIM)4, occurs in 91-96% ee and with virtually complete regiocontrol for the formation of β-benzyl-γ-butyrolactones. This methodology has been applied to the total synthesis of dibenzylbutyrolactone lignans (-)- and (+)-enterolactone, (-)- and (+)-hinokinin, and (+)-arctigenin from substituted cinnamic acids in 19-27% overall yields. Aryltetralin lignan (+)-isodeoxypodophyllotoxin was prepared from the reactant 3,4-(methylenedioxy)cinnamic acid in 36% yield overall, and the lactone precursor to (+)-isolauricerisinol was formed in 96.5% ee and 23% yield overall. Applications of the chiral Rh2(MPPIM)4 catalysts to fully aliphatic systems resulting in the formation of β-substituted-γ-butyrolactones with high regiocontrol and with 93-96% ee have demonstrated the generality of this methodology. A model that provides accurate predictions of β-substituted-γ-butyrolactone absolute configurations in these asymmetric metal carbene transformations is described.
An organo-iron mediated chiral synthesis of (+)-(S)-[6]-Gingerol
Le Gall,Lellouche,Beaucourt
, p. 6521 - 6524 (2007/10/02)
A short and efficient synthesis of (+)-(S)-[6]-Gingerol is described. The key step is a highly stereoselective cycloaddition of a nitrile oxide with a chiral iron complexed triene.
