Asymmetric reduction of 3-hydroxymethylbutenolide derivatives by bakers' yeast: A new approach to the synthesis of factor-I
摘要:
Bakers' yeast reduction of 3-benzyloxymethylbutenolide gave (S)-3-benzyloxymethylbutanolide, and its transformation to Factor-I, the autoregulator of Streptomyces viridocchromogenes, was examined.
Comparing the Stereoselective Biooxidation of Cyclobutanones by Recombinant Strains Expressing Bacterial Baeyer–Villiger Monooxygenases
作者:Florian Rudroff、Joanna Rydz、Freek H. Ogink、Michael Fink、Marko D. Mihovilovic
DOI:10.1002/adsc.200700072
日期:2007.6.4
cyclobutanone structural motif was investigated using a collection of eight monooxygenases of different bacterial origin. This platform of enzymes is able to perform stereoselective biotransformations on an array of structurally diverse substrates. With several ketone precursors, biooxidations yielded enantiocomplementary butyrolactones as key intermediates for the synthesis of natural products and bioactive compounds
Baeyer–Villiger monooxygenase-catalyzed desymmetrizations of cyclobutanones. Application to the synthesis of valuable spirolactones
作者:María Rodríguez-Mata、Iván Lavandera、Vicente Gotor-Fernández、Vicente Gotor、Susana García-Cerrada、Javier Mendiola、Óscar de Frutos、Iván Collado
DOI:10.1016/j.tet.2015.12.071
日期:2016.11
A series of γ-butyrolactone derivatives, including some spiranic ones, was obtained through desymmetrization of the corresponding prochiral 3-substituted cyclobutanones via Baeyer–Villiger monooxygenase (BVMO)-catalyzed oxidation. After reaction optimization using several commercial enzymes, both antipodes of various lactones were synthesized in most cases with >90% conversion and >80% enantiomeric
Preparation of chiral 4-benzyloxymethyldihydrofuran-2-one using lipase-catalyzed kinetic resolution: synthesis of (−)-Virginiae Butanolide C (VB C)
作者:Kunihiko Takabe、Nobuyuki Mase、Hidetoshi Matsumura、Takehiro Hasegawa、Yasuhiro Iida、Hisashi Kuribayashi、Kenji Adachi、Hidemi Yoda、Masato Ao
DOI:10.1016/s0960-894x(02)00458-4
日期:2002.9
Lipase-catalyzed kinetic resolution of the N,N-dialkyl-3-benzyloxymethyl-4-hydroxybutanamide 10a,b afforded the acetate 11a,b with (R) configuration, whereas the N-monoalkyl-3-benzyloxymethyl-4-hydroxybutanamide 10c-e gave the acetate 11c-e with (S) configuration. The butanamide 10 smoothly cyclized to give chiral 4-benzyloxymethyldihydrofuran-2-one 9 without racemization, which was effectively transformed
An ion-pair catalyst generated by assembly of a chiral flavinium and a cinchona alkaloid dimer for use in asymmetricBaeyer-Villigeroxidation is presented.
Asymmetric Syntheses of Trisubstituted Tetrahydrofuran Lignans, Sesaminone and 4-Epidihydrosesamin
作者:Hidemi Yoda、Kohei Kimura、Kunihiko Takabe
DOI:10.1055/s-2001-11419
日期:——
An efficient and stereodefined process is described for the preparation of 2,3,4-trisubstituted tetrahydrofuran lignans, sesaminone and 4-epidihydrosesamin. The synthetic strategy is based on the similar chemoselective hydrogenation of functionalized lactol derivatives, elaborated through asymmetric condensation of a 4,5-trans-disubstituted lactone.