60755-86-4Relevant academic research and scientific papers
SYNTHESIS OF 1-METHOXY CANTHINE-6-ONE
Hagen, Timothy J.,Cook, James M.
, p. 2421 - 2424 (1988)
The six step synthesis of the cytotoxic antileukemic alkaloid 1-methoxy canthine-6-one 2 is described.The pivotal steps are represented by the oxidation (DDQ) of 9 to afford the 3-acylindole 14 and the conversion of 11 into the 4-methoxy-1-alkyl β-carboline 15.
1-HYDROXYCANTHIN-6-ONE, AN ALKALOID FROM AILANTHUS GIRALDII
Khan, Suroor, A.,Shamsuddin, K. M.
, p. 2062 - 2063 (1981)
A new alkaloid has been isolated from the heartwood of Ailanthus giraldii and its structure determined as 1-hydroxycanthin-6-one.Key Word Index - Ailanthus giraldii, Simaroubaceae; 1-hydroxycanthin-6-one; alkaloid.
A total synthesis of 1-methoxycanthin-6-one: An efficient one-pot synthesis of the canthin-6-one skeleton from β-carboline-1-carbaldehyde
Suzuki, Hideharu,Adachi, Makoto,Ebihara, Yuki,Gyoutoku, Hiroshi,Furuya, Hinako,Murakami, Yasuoki,Okuno, Hiroaki
, p. 28 - 32 (2007/10/03)
A total synthesis of naturally occurring 1-methoxycanthin-6-one is described. In this synthesis, we achieved one-pot conversion from β-carboline-1-carbaldehyde to the canthin-6-one skeleton by the sequential addition of lithium ketene acetal in LiHMDS solution followed by the addition of EtOH in the reaction mixture.
DDQ Oxidations in the Indole Area. Synthesis of 4-Alkoxy-β-carbolines Including the Natural Products Crenatine and 1-Methoxycanthin-6-one
Hagen, Timothy J.,Narayanan, Krishnaswamy,Names, Jeffrey,Cook, James M.
, p. 2170 - 2178 (2007/10/02)
The seven-step synthesis of the cytotoxic, antileukemic alkaloid 1-methoxycanthin-6-one (2b) is described.The pivotal steps are represented by the oxidation (DDQ, aqueous THF, room temperature) of 1-(methoxycarbonyl)-1,2,3,4-tetrahydro-β-carboline (10) to provide the 4-oxo-substituted derivative 14 in 78percent yield, and conversion of the 4-oxo analogue 7 into 4-methoxy-1-alkyl-β-carboline (23) via a methoxylation-oxidation process .This four-step, one-pot reaction has been shown to be general; 4-oxo-1,2,3,4-tetrahydro-β-carboline (18) was converted into the corresponding 4-methoxy-, 4-ethoxy-, 4-(allyloxy)-, and 4-(benzyloxy)-β-carbolines (19a-d, respectively) on heating in the appropriate alcohol in the presence of pTSA and a trialkyl orthoformate (Table II).The proposed mechanism for this intriguing transformation is outlined in Scheme IV.Execution of this process has also resulted in a four-step preparation of crenatine (1a), a 4-methoxy-1-ethyl-β-carboline alkaloid.Finally, steric and electronic parameters have also been successfully manipulated to direct the DDQ oxidation of 1,2,3,4-tetrahydro-β-carbolines to position 1, regiospecifically.The conversion of tetrahydro-β-carboline 25 into 2-acylindole 38 and benzamide 26 into 1-oxotetrahydro-β-carboline 27 (Table I), respectively, is in agreement with the proposed mechanism for this process.
