33512-45-7

Upstream product

• 16797-75-4 di-tert-butylthioketene 
• 33512-44-6 3,6-di-tert-butyl-4,5-dichloro-2,2,7,7-tetramethyl-octa-3,5-diene 
• 7171-72-4 1,1,6,6-tetrakis(tert-butyl)-1,2,3,4,5-hexapentaene 
• 108263-91-8 2,2-Di-tert-butyl-3-(1-tert-butyl-2,2-dimethyl-propylidene)-cyclopropanone 
• 111425-71-9 2,2-Di-tert-butyl-3-(2-tert-butyl-3,3-dimethyl-but-1-enylidene)-thiirane 
• 33420-20-1 3,6-di-tert-butyl-2,2,7,7-tetramethyloct-4-yn-3,6-diol 
• 815-24-7 Di-t-butyl ketone 
• 29571-65-1 2-tert-butyl-3,3-dimethyl-butyryl chloride 

Downstream Products

• 108263-91-8 2,2-Di-tert-butyl-3-(1-tert-butyl-2,2-dimethyl-propylidene)-cyclopropanone 
• 108296-88-4 4,4-di-tert-butyl-2-(1-tert-butyl-2,2-dimethyl-1-propylidene)oxetan-3-one 
• 108296-89-5 3-Chloro-benzoic acid 1,1,4-tri-tert-butyl-4-hydroxy-5,5-dimethyl-hex-2-ynyl ester 
• 108296-91-9 2,2,5,5-Tetra-tert-butyl-1,4-dioxa-spiro[2.3]hexan-6-one 

Relevant academic research and scientific papers

Cyclopropanones from the oxidation of hindered [4]- and [5]-cumulenes with epoxidation reagents

The oxidation of tert-butyl-substituted [5]-cumulene 4 with epoxidizing agents was shown to give sequentially formed conjugated cyclopropanones 15 and 11. The more stable cyclopropanone 11 was isolated and shown to add carboxylic acids to give allenyl ketones of type 5 and to thermally and photochemically lose carbon monoxide to give the [4]-cumulene 6. The oxidation of 4 with peracids leads directly to allenyl ketones 5 as isolated products. Hydrolysis of 5a produced the novel furofuran 9 The oxidation of the hindered [4]-cumulene 6 gave conjugated cyclopropanone 19, which underwent chemical transformations similar to those of 11. These oxidations are rationalized in terms of hypothetical cumulene oxide intermediates that rapidly isomerize to the observed cyclopropanones.

SYNTHESIS AND REACTION OF NOVEL SULFUR CONTAINING HETEROCYCLIC SYSTEMS

The strained alkylidene episulfides were synthesized by carbene and alkylidene carbene additions to thiocarbonyl compounds.Thermal, photochemical, and acid catalyzed reactions have been extensively investigated, and the transition metal-promoted reaction

NEW ASPECTS IN THE TAUTOMERISM OF 1,2,3-BUTATRIENE EPISULFIDES

Facile formation of novel 1,2,3-butatriene episulfides by alkenylidene carbene addition to thioketone is described, and the relative stability of the 1,2,3-butatriene 1-episulfide and 2-episulfide is also discussed.

A NOVEL FORMATION OF 1,2,3-BUTATRIENE EPISULFIDES BY THIONATION OF METHYLENECYCLOPROPANONES

Sterically hindered methylenecyclopropanones were thionated with phosphorus pentasulfide in pyridine to afford novel 1,2,3-butatriene episulfides and thiiranoradialene derivative via methylenecyclopropanethione intermediate.