To bad its not on espacenet :o(
Brazillian Bees?
Process for the preparation of methylphenidate and its derivatives.
Dias, Luiz Carlos.
(Universidade Estadual de Campinas- Unicamp, Brazil). Braz. Pedido PI (2001),
BR 9903436 A 20010313 Patent written in Portuguese.
Patent BR9903436 (http://l2.espacenet.com/dips/viewer?PN=BR9903436&CY=gb&LG=en&DB=EPD)
Abstract
A high-yield process for the prepn. of methylphenidate and its 4-substituted Ph derivs. is presented.
Those who give up essential liberties for temporary safety deserve neither liberty nor safety