D-Erythronolactone as a C4 building unit. Part 2.1 A short and efficient synthesis of both enantiomers of epi-muricatacin, a diastereoisomer of the native acetogenin from Annona muricata
Both enantiomers of epi-muricatacin (+)- and
(-)-2 have been prepared from
2,3-O-isopropylidene-D-erythrose 7. The enantiomers (+)-
and (-)-2 are obtained in good yields and with high
diastereoisomeric and enantiomeric purity. The aim of the
synthesis is to obtain both enantiomers of the target molecule
from one chiral precursor. This was made possible by the reaction
sequence for the introduction of the two different side chains
being exchangeable.
Concise stereoselective total synthesis of (+)-muricatacin and (+)<i>-epi-</i>muricatacin
作者:Hong-Bo Dong、Ming-Yan Yang、Bin Liu、Ming-An Wang
DOI:10.1080/10286020.2014.916695
日期:2014.8.3
Efficient stereoselective totalsynthesis of (+)-muricatacin (1) and (+)-epi-muricatacin (8) was accomplished from commercially available chemical pent-4-ynoic acid via Shi's asymmetric epoxidation and Mitsunobu reaction as the key steps in 17.8% and 26.9% overall yields, respectively.
Synthesis of (4R,5R)-muricatacin and its (4R,5S)-analog by sequential use of the photo-induced rearrangement of epoxy diazomethyl ketones
作者:Marcel P.M. van Aar、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/0040-4020(95)00670-4
日期:1995.10
The naturally occurring δ-hydroxy-γ-lactone (4R,5R)-muricatacin and its nonnatural (4R,5S)-analog are synthesized. The starting achiral allylic alcohols are converted into α,β-epoxy diazomethylketones followed by a stereospecific irradiation reaction of these compounds to give 4-hydroxy-2-alkene esters. Using this method in a sequential manner a successive introduction of stereogenic centers is realized
Concise syntheses of the polyketide natural product (–)-muricatacin and (–)-( R , R )-L-factor (natural product enantiomer) were achieved in four steps by employing an organocatalytic asymmetric direct vinylogous aldol reaction of γ-crotonolactone and suitable aliphatic aldehydes as the key step.
聚酮化合物天然产物 (-)-muricatacin 和 (-)-( R , R )-L-因子(天然产物对映异构体)的简明合成是通过采用 γ-巴豆内酯和合适的脂肪醛作为关键步骤。
Enantioselective synthesis of γ-lactones from thioglycolic acid: Syntheses of (−)-muricatacin and 5-epi-(−)-muricatacin
作者:Sue-Wen Chang、Chiu-Yong Hung、Hung-Hsin Liu、Biing-Jiun Uang
DOI:10.1016/s0957-4166(98)00007-x
日期:1998.2
An approach for the enantioselective synthesis of functionalized γ-lactones and its application to the syntheses of (−)-muricatacin 1a and 5-epi-(−)-muricatacin 1b is reported. A sequential oxidation of the intermediate 4 with m-chloroperoxybenzoic acid was conducted to realize the reaction mechanism.