Abbott Laboratories Corporation

David Scarpetti

Anthony Ralph Haight

Howard E Morton

Timothy L Stuk

Jien-Heh J Tien

Timothy A Robbins

M Robert Leanna

Francis A Kerdesky

Hing L Sham

Daniel W Norbeck

Chen Zhao

Thomas J Sowin

Michael S Allen

Daniel S Reno

Denton C Langridge

Linda M Lijewski

Laura Melcher

Steven J Wittenberger

Bikshandar A Narayanan

Intermediates and processes are disclosed which are useful for the preparation of a substantially pure compound of the formula: ##STR1## wherein R.sub.6 and R.sub.7 are each hydrogen or R.sub.6 and R.sub.7 are independently selected from ##STR2## wherein R.sub.a and R.sub.b are independently selected from hydrogen, loweralkyl and phenyl and R.sub.c, R.sub.d and R.sub.e are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and ##STR3## wherein the naphthyl ring is unsubstituted or substituted with one, two or three substitutents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or R.sub.6 is as defined above and R.sub.7 is R.sub.7a OC(O)-- wherein R.sub.7a is loweralkyl or benzyl; or R.sub.6 and R.sub.7 taken together with the nitrogen atom to which they are bonded are ##STR4## wherein R.sub.f, R.sub.g, R.sub.h and R.sub.i are independently selected from hydrogen, loweralkyl, alkoxy, halogen and trifluoromethyl and R.sub.8 is hydrogen or --C(O)R' wherein R' is loweralkyl, alkoxy, benzyloxy or phenyl wherein the phenyl ring is unsubstituted or substituted with one, two or three substituents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or an acid addition salt thereof.

Process for the preparation of a substituted 2.5-diamino-3-hydroxyhexane

Intermediates and processes are disclosed which are useful for the preparation of a substantially pure compound of the formula: ##STR1## wherein R.sub.6 and R.sub.7 are each hydrogen or R.sub.6 and R.sub.7 are independently selected from ##STR2## wherein R.sub.a and R.sub.b are independently selected from hydrogen, loweralkyl and phenyl and R.sub.c, R.sub.d and R.sub.e are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and ##STR3## wherein the naphthyl ring is unsubstituted or substituted with one, two or three substitutents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or

Process for the preparation of a substituted 2.5-diamono-3-hydroxy-hexane

Process for the preparation of a substituted 2,5-diamino-3-hydroxyhexane

A substantially pure compound of formula: ##STR1## wherein R.sub.6 and R.sub.7 are independently selected from ##STR2## wherein R.sub.a and R.sub.b are independently selected from hydrogen, loweralkyl and phenyl and R.sub.c, R.sub.d and R.sub.e are independently selected from hydrogen, loweralkyl, trifluoromethyl, alkoxy, halo and phenyl; and ##STR3## wherein the naphthyl ring is unsubstituted or substituted with one, two or three substitutents independently selected from loweralkyl, trifluoromethyl, alkoxy and halo; or

The present invention relates to a process for the preparation of 5-aryl tetrazoles of the formula: ##STR1## or a salt thereof comprising reacting an aryl nitrile with a trisubstituted silyl azide and a disubstituted tin oxide.

Process for the preparation of tetrazoles

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Evanston, IL, United States of America

David Scarpetti