US 12,043,619 B2Granted

Near and shortwave infrared polymethine dyes

AssigneeMassachusetts Institute of Technology

InventorsEllen M. Sletten, Timothy M. Swager, Justin Caram

Life of this patent

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Near infrared and shortwave infrared dyes can have polymethine structures.

Dependent claims

A flavylium polymethine dye selected from:

wherein
X− is Cl−, ClO4−, BF4−, Br−, I−, tosylate, triflate, trifluoroacetate, acetate, bromide, or tetraalkylborate, and
R is hydrogen, alkyl, acyl or heteroalkyl.

Dependencies are inferred from the claim text.

C07D 311/74
Ortho- or peri-condensed with carbocyclic rings or ring systems: benzo[b]pyrans, hydrogenated in the carbocyclic ring
C07D 411/10
Containing two hetero rings: linked by a carbon chain containing aromatic rings
C07D 311/62
With aryl radicals attached in position 2: with oxygen atoms directly attached in position 3, e.g. anthocyanidins
C07D 311/68
Other than with oxygen or sulphur atoms in position 2 or 4: with nitrogen atoms directly attached in position 4

From the US filing history. Foreign family members aren’t listed.

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