13567-57-2

Upstream product

• 1195-79-5 1,3,3-trimethyl-2-norbornanone 
• 59983-62-9 Li{(CH₂)(CH₂)P(C₆H₅)2} 
• 80-56-8 Pinene 
• 79-11-8 chloroacetic acid 
• 2371-42-8 1,2,7,7-tetramethylbicyclo<2.2.1>heptan-exo-2-ol 

Downstream Products

• 1195-79-5 1,3,3-trimethyl-2-norbornanone 

Relevant academic research and scientific papers

Dehydration products of 2-methylisoborneol

2-Methylenebornane and 2-methyl-2-bornene have previously been identified as dehydration or degradation products of 2-methylisoborneol (MIB), a compound responsible for taste and odour problems in various water environments. Previously, the identification of these products has been based on mass spectral analysis only. The dehydration of MIB under a variety of conditions was reinvestigated and the products fully characterised by 1H and 13C n.m.r. and GC-MS. Comparison of EI mass spectra of the dehydration products of MIB with those published previously indicate that earlier assignments of MIB dehydration products are incorrect. 2-Methylenebornane and 2-methyl-2-bornene have previously been identified as dehydration or degradation products of 2-methylisoborneol (MIB), a compound responsible for taste and odour problems in various water environments. Previously, the identification of these products has been based on mass spectral analysis only. The dehydration of MIB under a variety of conditions was reinvestigated and the products fully characterised by 1H and 13C n.m.r. and GC-MS. Comparison of EI mass spectra of the dehydration products of MIB with those published previously indicate that earlier assignments of MIB dehydration products are incorrect.

Reaction of α-pinene with haloacetic acids

The reactions of α-pinene with chloro-, bromo-, and trichloroacetic acids, accompanied by isomerization of α-pinene, were studied.

Reactivity of phosphonium diylids with aldehydes and ketones

Non-stabilized and semi-stabilized phosphonium diylids of the type (C6H5)2P(CHR)(CHLiR) (5) show a greater nucleophilic reactivity toward carbonyl compounds than the corresponding monoylids (C6H5)2P(CHR)(CH2R) (8).Thus diylid 5a reacts readily at room temperature with sterically hindered ketones such as fenchone or di-t-butylketone.However, the residual negative charge in the intermediate adduct 13 slows the decomposition to Wittig products and is probably responsible for the observed changes (generally enhancement) in the E-selectivity in the case of non-stabilized as well as semi-stabilized ylids.