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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1703237Generated: October 27, 2026

Acetic Anhydride → 3-[2,4-Bis(diethylamino)phenyl]-3-(1-n-octyl-2-methyl-3-indolyl)phthalide

https://huagongshe.com/reaction/1703237

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAcetic AnhydrideHCID 7918—
ReactantN~1~,N~1~,N~3~,N~3~-Tetraethylbenzene-1,3-diamineHCID 19382815—
Reactant2-(2-Methyl-1-octyl-1H-indole-3-carbonyl)benzoic acidHCID 19763802—
Product3-[2,4-Bis(diethylamino)phenyl]-3-(1-n-octyl-2-methyl-3-indolyl)phthalideHCID 20523552—

Reaction Steps

Proceeding in a manner similar to that described in part B of Example 5 above, 2.34 g (0.006 mole) of 2-[(1-n-octyl-2-methyl-3-indolyl)carbonyl]benzoic acid prepared according to Example 5, part A, and 2.40 g of N,N,N',N'-tetraethyl-m-phenylenediamine were interacted in the presence of 2.40 g of acetic anhydride to obtain 3-[2,4-bis(diethylamino)phenyl]-3-(1-n-octyl-2-methyl-3-indolyl)phthalide (Formula III: R0 =R1 =R2 =R3 =Y1 =H; R=CH2CH3 ; R4 =N(CH2CH3)2 ; R5 =CH3 ; R6 =(CH2)7CH3) as a tar-like semisolid. A toluene solution of this material developed a purple color when spotted on silica gel.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04351768
Source datasetuspto-grants-1982_09
ORD IDord-d60d6d178399431b9cfd3261d91c7292
Source noteuspto-grants-1982_09