Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-09-20
2005-09-20
Raymond, Richard L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C540S465000, C540S468000, C540S469000, C540S472000
Reexamination Certificate
active
06946552
ABSTRACT:
A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
REFERENCES:
patent: 5225433 (1993-07-01), Dougherty et al.
Taniguchi et al., Chemical Abstracts, vol. 136:30780, 2001.
Balasubramanian Thiagarajan
Lindsey Jonathan S.
M Guoning
Ra Doyoung
Taniguchi Masahiko
Myers Bigel Sibley & Sajovec P.A.
North Carolina State University
Raymond Richard L.
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