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Proach is incorporated in Scheme two, treated with aniline (17) to ple of this strategy is always to aldehyde 20 (G = CHO), which in turn is condensed with methyl incorporated in Scheme 2, in which 16 is treated with aniline (17) to subsequently oxidized 18 (G = COOEt) that LY294002 medchemexpress decreased to benzyl alcohol 19 (G = CH2OH) and yield the intermediate yield the intermediate 18 (G = COOEt) that lowered to (22) in 40 with the (G = CH2OH) of 15 phenylacetateoxidized to 1,6-naphthyridin-2(1H)-one benzyl alcohol 19 international yield.8 and subsequently 21 to yield aldehyde 20 (G = CHO), which in turn is condensed with methyl subsequently oxidized to aldehyde 20 (G = CHO), which in turn is condensed with methyl phenylacetate 21 to yield 1,6-naphthyridin-2(1H)-one (22) in 40 from the global yield. phenylacetate 21 to yield 1,6-naphthyridin-2(1H)-one (22) in 40 from the international yield.Scheme 2. Synthesis of 1,6-naphthyridin-2(1H)-one (22) from four,6-dichloro-3-pyridinecarboxylate (16). Scheme 2. Synthesis of 1,6-naphthyridin-2(1H)-one (22) from four,6-dichloro-3-pyridinecarboxylate (16). Scheme two. Synthesis of Inside the other two references, the chloro substituted pyridine bears (16). 1,6-naphthyridin-2(1H)-one (22) from 4,6-dichloro-3-pyridinecarboxylate an aldehyde (G =CHO) [75] or ketone group (G = the chloro substituted pyridine bears an isn’t a single In the other two references, COMe) [76]. It is noteworthy that there aldehyde (G = the other two references, the chloro substituted pyridine an an aldehyde Within the the building of 1,6-naphthyridin-2(1H)-ones (14) with C3-C4 single bond. bears instance of other two references, the chloro substituted pyridinethat abearsaldehyde (G = CHO) [75] or ketone group (G = COMe) [76]. It really is noteworthy there is not a single (G = (b) The useor ketone group = COMe)preformednoteworthy that there is not a single CHO) or ketone groupmaterial of a [76]. It truly is is noteworthy thatunsubstituted pyri[75] as starting (G (G = COMe) [76]. It N-substituted or there is not a CHO) [75] example with the construction of 1,6-naphthyridin-2(1H)-ones (14) with a C3-C4 single bond. of the building of 1,6-naphthyridin-2(1H)-ones (14) having a C3-C4 single bond. instance building of 1,6-naphthyridin-2(1H)-ones a COOR, or COMe,) dine-4-amine (23) that consists of a carbonafunctional group G (CHO, CNC3-C4 single bond. (b) The use as beginning material a preformed N-substituted or unsubstituted pyri(b) The use as starting material of a preformed N-substitutedunsubstituted pyridineor or unsubstituted pyri(b) The use as beginning material ofof preformed N-substitutedto the CFT8634 Purity & Documentation disconnection of the at position C3 (23) that contains a carbonapproach corresponds dine-4-amine of the pyridine ring. This functional group G (CHO, CN COOR, or COMe,) 4-amine (23) carbon functional group G (CHO, CN or dine-4-aminethat consists of a thea1,6-naphthyridin-2(1H)-one(CHO, CN COOR, COMe,) at that includes carbon functional group G program COOR, 7). or COMe,) N1 2 andC3(23)the pyridine ring. This strategy corresponds towards the disconnection with the (Figure Within the case at position C3 four bonds of position C3 of of pyridine ring. This strategy corresponds tothe disconnection of the the pyridine ring. This method at position C3 of thethere are 76 references (50 ofcorresponds to [77,78], 12 references the the disconnection of for with the CHO C3 four bonds with the 1,6-naphthyridin-2(1H)-one system (Figure 7). In the case group, them patents) N1 two and N1 two and C3-C4 bonds in the N1 two and C3 four bonds of the 1,6-naphthyri.

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Author: haoyuan2014