C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/237.1, 260/2
C07D 498/18 (2006.01)
Patent
CA 1133478
ABSTRACT OF THE DISCLOSURE Novel maytansinoids of the formula: Image wherein R is C3-10 cycloalkyl, C3-10 cycloalkenyl, phenyl or a heterocyclic group selected from the class consisting of pyridyl, pyrrolidinyl, tetrazolyl, furyl and thienyl, said cycloalkyl, cycloalkenyl, phenyl and heterocyclic group being unsubstituted or substituted by C1-4 alkyl, C1-4 alkoxy, C2-4 alkanoyl, C2-4 alkanoyloxy, C2-4 alkoxycarbonyl, halogen, nitro, cyano, trifluoromethyl, di-C1-4 alkylamino, C1-4 alkylthio, methylsulfinyl, methylsulfonyl, oxo, thi- oxo or C1-4 alkanoylamido, and A is C1-4 alkylene or a bond, provided that A means said alkylene when attached to a N atom in said heterocyclic group R, have antimitotic and antitumor activities, and are of value as medicines.
338507
Akimoto Hiroshi
Miyashita Osamu
Fetherstonhaugh & Co.
Takeda Chemical Industries Ltd.
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