| 摘要 |
The present invention provides a compound having a heterocyclic skeleton, which is represented by of the formula (I): wherein R1 and R2 are the same or different and each is a lower alkyl group optionally having substituent(s), an aralkyl group optionally having substituent(s) or an aryl group optionally having substituent(s), or R1 and R2 in combination form, together with the nitrogen atom they are bonded to, a heterocycle optionally having substituent(s) (the heterocycle is optionally condensed with an aromatic hydrocarbon ring); ring A is an imidazole ring condensed with an aromatic ring optionally having substituent(s), or a pyrimidin-4-one ring condensed with an aromatic ring optionally having substituent(s); R3 and R4 are the same or different and each is a lower alkyl group optionally having substituent(s), a lower alkenyl group optionally having substituent(s), a lower alkynyl group optionally having substituent(s), an aralkyl group optionally having substituent(s) or an aryl group optionally having substituent(s), or R3 and R4 in combination form, together with the carbon atoms they are respectively bonded to, a homocycle optionally having substituent(s), or a heterocycle optionally having substituent(s) (the homocycle and heterocycle are optionally condensed with an aromatic hydrocarbon ring); and R5 and R6 are the same or different and each is a hydrogen atom or a lower alkyl group optionally having substituent(s), a tautomer thereof or a salt thereof, and which is useful as a catalyst for an asymmetric synthesis.
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