中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1,5-dimethoxy-9,10-dioxo-9,10-dihydroanthracene-2-carbaldehyde | 125379-55-7 | C17H12O5 | 296.279 |
—— | 1-hydroxy-2-hydroxymethyl-5-methoxy-9,10-anthraquinone | 103576-97-2 | C16H12O5 | 284.268 |
1-羟基-5-甲氧基-9,10-蒽醌 | 1-hydroxy-5-methoxy-9,10-anthraquinone | 52869-21-3 | C15H10O4 | 254.242 |
—— | 1-hydroxy-5-methoxy-2-(prop-2'-enyl)anthraquinone | 240403-03-6 | C18H14O4 | 294.307 |
—— | 1-hydroxy-5-methoxy-2-(prop-1'-enyl)anthraquinone | 240403-04-7 | C18H14O4 | 294.307 |
—— | 1-hydroxy-5-(prop-2'-enyloxy)anthraquinone | 160697-61-0 | C17H12O4 | 280.28 |
—— | 1-methoxy-5-(prop-2'-enyloxy)anthraquinone | 240403-02-5 | C18H14O4 | 294.307 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1-benzyloxy-2-formyl-5-methoxyanthraquinone | 240403-00-3 | C23H16O5 | 372.377 |
—— | 1-hydroxy-5-methoxy-2-acetyl-9,10-anthraquinone | 116161-98-9 | C17H12O5 | 296.279 |
—— | 1-hydroxy-5-methoxy-2-(2'-oxopropyl)anthraquinone | 116161-97-8 | C18H14O5 | 310.306 |
—— | 2-(9,10-dihydro-1-hydroxy-5-methoxy-9,1-dioxo-2-anthrylmethyl)-2-methyl-oxirane | 116162-04-0 | C19H16O5 | 324.333 |
—— | tert-butyl 2-(9,10-dihydro-1-hydroxy-5-methoxy-9,10-dioxo-2-anthryl)-3-hydroxy-3-methyl butanoate | 116162-00-6 | C24H26O7 | 426.466 |
—— | 2,3,4,7,12-pentahydro-3-hydroxy-8-methoxy-3-methyl-anthracene-<1,2b>pyran-7,12-dioneoxirane | 116162-05-1 | C19H16O5 | 324.333 |
—— | 1,5-dimethoxy-2-(6'-methyl-4'-oxo-2',3'-dihydro-4'H-pyran-2'-yl)anthraquinone | 240415-38-7 | C22H18O6 | 378.381 |
Reactions between benzaldehyde or o-anisaldehyde and a series of silyloxy dienes catalysed by the chiral acyl- oxyborane (CAB) complex (4) give high yields of enantioselective products from a Mukaiyama aldol rather than a hetero-Diels–Alder reaction. Attempts to effect a similar catalytic reaction with anthraquinone aldehydes were unsuccessful but use of 2 equiv. of the CAB complex (1) followed by cyclization promotes a formal hetero- Diels–Alder reaction between the aldehyde (7) and the diene (12) to give the dihydropyrone (24) in 45% yield and with a 79% e.e. in favour of the 2'R enantiomer. Hetero-Diels–Alder reactions between the aldehyde (7) and the diene (12) using the chiral titanium complexes Ti[(R)-BINOL]Cl 2 , Ti[(R,R)-TADDOL]Cl 2 and Ti[(R)-BINOL] 2 have been investigated. The first two complexes promote the reaction at −30 and −78° respectively but with low induced enantioselectivities.
Syntheses of C2 anthraquinone aldehydes from the commercially availableanthraru¯n (1) have been investigated. A synthesis of the keto aldehyde(2) in nine steps and 73% overall yield was achieved. Syntheses of (2)exploiting selective oxidations of either a C-boundallyl group by Wacker oxidation to introduce the methyl keto functionality orof a C-bound prop-1-enyl moiety by dihydroxylation andoxidative cleavage to generate the C2 formyl group were also developed. Thealdehyde (27) was synthesized in seven steps and in 81% overall yieldfrom (1), and syntheses of the phenolic aldehydes (33), (34), and (35), the C1benzyloxy aldehyde (36) and the anthracene aldehyde (37) were also developed.