111138-61-5

Upstream product

• 28306-68-5 dimethyl (+/-)-2,3-dimethylbutanedioate 
• 608-40-2 rac-2,3-dimethylsuccinic acid 
• 105592-22-1 acetoxy-4 dimethyl-2,5 butanoate de ethyle 
• 13545-04-5 2,3-dimethylsuccinic acid 

Downstream Products

• 57340-48-4 D_g-threo-2,3-dimethyl-1,4-bis-(toluene-4-sulfonyloxy)-butane 
• 1255763-55-3 C₂₅H₄₂O₅Si 
• 1255763-92-8 C₁₆H₂₂O₃ 
• 1293966-38-7 C₃₅H₅₁NO₆Si 
• 1293966-61-6 C₂₄H₄₂O₃S₂Si 
• 1293966-62-7 C₁₈H₂₈O₃S₂ 
• 1293966-36-5 C₁₈H₂₆O₃S₂ 
• 1293966-63-8 C₁₉H₂₈O₂S₂ 
• 1293966-37-6 C₂₉H₃₇NO₆ 
• 1293966-64-9 C₃₅H₅₁NO₆Si 
• 1293966-65-0 C₂₅H₄₂O₅Si 
• 1293966-48-9 C₄₄H₆₆O₉SSi 
• 1293966-71-8 C₃₇H₆₀O₉Si 
• 1293966-49-0 C₄₃H₇₄O₉Si₂ 

Relevant academic research and scientific papers

A phosphine-free iron complex-catalyzed synthesis of cycloalkanes: Via the borrowing hydrogen strategy

Herein we report a diaminocyclopentadienone iron tricarbonyl complex catalyzed synthesis of substituted cyclopentane, cyclohexane and cycloheptane compounds using the borrowing hydrogen strategy in the presence of various substituted primary and secondary 1,n diols as alkylating reagents. Deuterium labeling experiments confirm that the diols were the hydride source in this cascade process. This journal is

Stereospecificite de l'addition de Michael d'enethiolates avec les enones acyliques

1,4-Addition reaction of lithiated dithioesters with acyclic β-substituted E enones affords diastereomeric 5-oxo-alkanedithioates.Anti configuration was assigned to yhe major diastereoisomer by chemical correlation.This stereochemistry depends on the configuration of the prochiral partners.The cis/trans ratio of intermediate enethiolates was analyzed by trapping experiments.Two cases of highly selective cis deprotonation of dithioesters were observed.Michael addition with E-enones (3-penten-2-one, chalcone) occurs with high stereospecificity : anti/syn product ratios are identical to the cis/trans enethiolate ratios.A pseudo-cyclic transition state is proposed with substituents of the enone C-C double bond occupying favorable equatorial positions.The 1,4-addition reaction is kineticaly controlled.In contrast to ester enolates, enethiolates allow the use of enones without the need of tertiobutyl or phenyl groups.The observed diastereoselectivity (ratio anti/syn up to 95:5) offers a new means of creation of two vicinal carbon substituted asymmetric centers by carbon-carbon bond formation in the acyclic series.Poor selectivities were however observed when using unsaturated diesters as acceptors.