Abstract:
:Minerals may have played a significant role in chemical evolution. In the course of investigating the chemistry of phosphonoacetaldehyde (PAL), an analogue of glycolaldehyde phosphate, we have observed a striking case of catalysis by the layered hydroxide mineral hydrotalcite ([Mg2Al(OH)6][Cl.nH2O]). In neutral or moderately basic aqueous solutions, PAL is unreactive even at a concentration of 0.1 M. In the presence of a large excess of NaOH (2 M), the compound undergoes aldol condensation to produce a dimer containing a C3-C4 double-bond. In dilute neutral solutions and in the presence of the mineral, however, condensation takes place rapidly, to produce a dimer which is almost exclusively the C2-C3 unsaturated product.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
De Graaf RM,Visscher J,Xu Y,Arrhenius G,Schwartz AWdoi
10.1007/pl00006406subject
Has Abstractpub_date
1998-11-01 00:00:00pages
501-7issue
5eissn
0022-2844issn
1432-1432journal_volume
47pub_type
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