Method of preparing chroman derivatives, and synthesis...

Details Method of preparing chroman derivatives, and synthesis... Method of preparing chroman derivatives, and synthesis...

C - Chemistry, Metallurgy

07

C

204/91.17, 260/2

C07C 255/57 (2006.01) C07D 213/64 (2006.01) C07D 405/04 (2006.01)

Patent

CA 2006586

entitled: Method of preparing chroman derivatives, and synthesis intermediates in the names of: Georges GARCIA Daniel METTEFEU Richard ROUX Assignee: SANOFI ABSTRACT OF THE DISCLOSURE The invention describes a method of synthesizing a compound of the formula Image (I) in which - X = O or NR, - Z = an electron-attracting group, - R = H, CN or NO2, - R1 + Rz + N-C=X = a 5-membered or 6-membered hetero- cycle, and - R3 = H, R4 = OH or R3 + R4 = a bond, said method involving intermediates of the formula Image (IX) in which R5 = H, Br or N(R1)CXR2. This method of synthesis does not involve the epoxide derivative of the chroman. The novel compounds of formula (IX) form a further subject of the invention.

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