Helvetica Chimica Acta p. 1667 - 1673 (1993)
Update date:2022-08-29
Topics:
Martin, Pierre
Steiner, Eginhard
Auer, Kurt
Winkler, Tammo
The improvement of the PQQ synthesis according to the method of Corey and Tramontano allows the preparation of the triester of this cofactor in the kg scale with an overall yield of 13percent (average 78percent per step), without a bottleneck in the sequence and with crystalline, analytically pure intermediates.The new purification of free PQQ from conc.H2SO4 is remarkable with respect to the application as well as to the stability of this natural product.
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(1994)
