81096-93-7Relevant academic research and scientific papers
Tin-mediated regioselective benzylation and allylation of polyols: Applicability of a catalytic approach under solvent-free conditions
Giordano, Maddalena,Iadonisi, Alfonso
, p. 213 - 222 (2014/01/17)
The first catalytic version of the stannylene-mediated benzylation and allylation of polyols is reported. The methodology is based on a simple solvent-free protocol that significantly advances, in terms of both experimental ease and synthetic scope, the a
Highly diastereoselective construction of substituted pyrrolidines: Formal synthesis of (-)-bulgecinine
Das, Biswanath,Kumar, Duddukuri Nandan
, p. 1285 - 1287 (2011/07/09)
A highly diastereoselective synthesis of substituted pyrrolidines has been achieved starting from nonchiral molecule, allyl bromide, or cis-but-2-ene-1,4-diol. The method involves the asymmetric epoxidation and endo-mode epoxide opening with azide nucleop
Organocatalysis in natural product synthesis: A simple one-pot approach to optically active β-diols
Andersen, Nikolaj Rojkjaaer,Hansen, Signe Grann,Bertelsen, Soren,Jorgensen, Karl Anker
experimental part, p. 3193 - 3198 (2010/04/28)
Optically active β-diols have been prepared using an organocatalytic one-pot approach from α,β-unsaturated aldehydes using (E)-benzaldehyde oxime as nucleophile in an oxa-Michael reaction with subsequent in situ reduction or Grignard addition. With this p
Stereoselective syntheses of rolliniastatin 1, rollimembrin, and membranacin
Keum, Gyochang,Hwang, Cheol Hee,Kang, Soon Bang,Kim, Youseung,Lee, Eun
, p. 10396 - 10399 (2007/10/03)
A radical cyclization of β-alkoxyvinyl sulfoxides-Pummerer rearrangement-allylation protocol was successfully applied to the synthesis of the threol cis/threol cis/erythro bis-oxolane moiety in rolliniastatin 1 (1), rollimembrin (2), and membranacin (3).
Stereoselective chloroacetate aldol reactions: Syntheses of acetate aldol equivalents and darzens glycidic esters
Ghosh, Arun K.,Kim, Jae-Hun
, p. 2725 - 2728 (2007/10/03)
Aldol reaction of the Ti-enolate derived from cis-1-tosylamido-2-indanyl chloroacetate with representative aldehydes proceeded in excellent yield and high diastereoselectivities. Removal of chlorine provided alternative access to highly diastereoselective acetate aldol equivalents or the corresponding glycidic ester condensation products.
Synthesis of a new N-acetyl thiazolidinethione reagent and its application to a highly selective asymmetric acetate aldol reaction
Zhang, Yingchao,Sammakia, Tarek
, p. 3139 - 3141 (2007/10/03)
(Chemical Equation Presented) A new N-acetyl thiazolidinethione reagent, which undergoes highly diastereoselective aldol reactions upon enolization with dichlorophenylborane and (-)-sparteine and subsequent treatment with a variety of aldehydes, is descri
Toward a total synthesis of an aglycone of spiramycin; a chiron approach to the C-1/C-4 and the C-13/C-15 fragments
Breullles,Oddon,Uguen
, p. 6607 - 6610 (2007/10/03)
Acetalisation of p-anisaldehyde by either (R) or (S)-butanetriol has been shown to occur selectively and quantitatively by using Noyori's protocol. The crystalline dioxane derivatives R-6a and S-6a which formed respectively in these conditions have been converted efficiently into the title fragments of spiramycin.
Minor synthetic capacities of baker's yeast towards unnatural substrates
Fronza, Giovanni,Fuganti, Caludio,Grasselli, Piero,Pedrocchi-Fantoni, Giuseppe,Servi, Stefano
, p. 163 - 166 (2007/10/02)
Baker's yeast catalyzes numerous transformations on reactive substrates. α,β-Unsaturated aldehydes undergo water addition with the formation of chiral secondary alcohols, but sulfur nucleophiles (mercaptans) chemically add to the double bond with the partial kinetic resolution observed in the secondary thiol obtained, following enantioselective reduction of the intermediate aldehydes.These sulfur nucleophiles however interact with the yeast metabolic pathway allowing the isolation of carbohydrate derived chiral intermediates.The use of deuterated precursors orperforming the fermentation in D2O allows the isolation of chiral glycerol derivatives stereoselectively deuterated at different positions.
Stereocontrolled Total Synthesis of 9(R)-N-BOC-Ahda Methyl Ester
Chakraborty, Tushar K,Hussain, Azhar K,Joshi, Subodh P
, p. 2385 - 2388 (2007/10/02)
An efficient convergent route to the first total synthesis of 9(R)-N-BOC-Ahda methyl ester, in optically pure form, is described.
Conversion of 4-Oxy-Substituted Crotonaldehyde into 1-Protected (2R)-1,2,4-Butanetriol: A New Synthetic Capacity of Bakers' Yeast
Fronza, Giovanni,Fuganti, Claudio,Grasselli, Piero,Poli, Gianluigi,Servi, Stefano
, p. 6153 - 6154 (2007/10/02)
The bakers' yeast mediated conversion of 4-oxy-substituted crotonaldehydes 3 and 4 into 1-protected (2R)-1,2,4-butadienetriols 7a and 8a, in ca. 25percent yields, is reported.
