Facile synthesis of 1,9-diacyldipyrromethanes

Details Facile synthesis of 1,9-diacyldipyrromethanes Facile synthesis of 1,9-diacyldipyrromethanes

2005-08-02

2005-08-02

Nazario-Gonzalez, Porfirio (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C540S145000, C556S087000, C556S407000

Reexamination Certificate

active

06924375

ABSTRACT:
The present invention provides a method of making a metal complex. The method comprises the steps of: (a) acylating a dipyrromethane or a 1-monoacyldipyrromethane to form a mixed reaction product comprising a 1,9-diacyidipyrromethane; (b) combining the reaction product with a compound of the formula R2MX2in the presence of a base, where R is alkyl or aryl, M is Sn, Si, Ge, or Pb (preferably Sn), and X is halo, OAc, acac, or OTf, to form a product comprising a metal complex of the formula DMR2in the mixed reaction product, wherein D is a 1,9-diacyldipyrromethane; and then (c) separating the metal complex from the mixed reaction product. The method may be utilized for the convenient synthesis and separation of 1,9-diacyldipyrromethanes. Metal complex intermediates useful in such methods are also described.

REFERENCES:
Lee et al., Tetrahedron, vol. 51, No. 43, pp. 11645-11672 (1995).

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