中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1,2-环丙烷二羧酸 | cyclopropane-1,2-dicarboxylic acid | 1489-58-3 | C5H6O4 | 130.1 |
—— | (±)-trans-2-(hydroxymethyl)cyclopropanecarboxylic acid | 35501-81-6 | C5H8O3 | 116.117 |
—— | (1R,2R)-2-(methoxycarbonyl)cyclopropane-1-carboxylic acid | 88335-97-1 | C6H8O4 | 144.127 |
反-1,2-环丙烷二羧酸二甲酯 | dimethyl trans-1,2-cyclopropanedicarboxylate | 826-35-7 | C7H10O4 | 158.154 |
—— | (+/-)-trans-2-ethoxymethyl-cyclopropanecarboxylic acid | —— | C7H12O3 | 144.17 |
—— | Aethylmethyl-1,2-cyclopropandicarboxylat | 878-14-8 | C8H12O4 | 172.181 |
反-1,2-环丙烷二羧酸二乙酯 | diethyl trans-cyclopropane-1,2-dicarboxylate | 3999-55-1 | C9H14O4 | 186.208 |
—— | 2-acetyl-cyclopropanecarboxylic acid | 858423-15-1 | C6H8O3 | 128.128 |
—— | (1R,2R)-ethyl 2-(hydroxymethyl)cyclopropanecarboxylate | 1026787-30-3 | C7H12O3 | 144.17 |
—— | (+/-)-(1R,2S)-2-(1-methylethoxycarbonyl)-1-cyclopropanecarboxylic acid | —— | C8H12O4 | 172.181 |
—— | cis-1,2-cyclopropanedicarboxylic acid anhydride | 5617-74-3 | C5H4O3 | 112.085 |
—— | (-)-(R,R)-2-chloromethylenecyclopropane-1-carboxylic acid | 1101900-05-3 | C5H7ClO2 | 134.562 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (1R,2R)-2-(methoxycarbonyl)cyclopropane-1-carboxylic acid | 88335-97-1 | C6H8O4 | 144.127 |
顺-1,2-环丙烷二羧酸二甲酯 | dimethyl cis-cyclopropane-1,2-dicarboxylate | 826-34-6 | C7H10O4 | 158.154 |
反-1,2-环丙烷二羧酸二甲酯 | dimethyl trans-1,2-cyclopropanedicarboxylate | 826-35-7 | C7H10O4 | 158.154 |
(1R,2R)-2-(乙氧羰基)环丙烷羧酸 | trans-cyclopropane-1,2-dicarboxylic acid monoethyl ester | 613261-14-6 | C7H10O4 | 158.154 |
反-1,2-环丙烷二羧酸二乙酯 | diethyl trans-cyclopropane-1,2-dicarboxylate | 3999-55-1 | C9H14O4 | 186.208 |
—— | cis-1,2-cyclopropanedicarboxylic acid anhydride | 5617-74-3 | C5H4O3 | 112.085 |
3-氧杂二环[3.1.0]己烷-2,4-二酮 | 3-oxabicyclo[3.1.0]hexane-2,4-dione | 5617-74-3 | C5H4O3 | 112.085 |
—— | (1R,2R)-2-(tert-butoxycarbonyl)cyclopropane-1-carboxylic acid | 1909288-13-6 | C9H14O4 | 186.208 |
Triplet photosensitized irradiation of 2(S),3(R)-bis[(benzoyloxy)methyl]cyclobutanone gave optically pure (−)E-1(S),2(S)-bis(benzoyloxymethyl)cyclopropane as a major product in the nonpolar fraction along with its stereoisomer and cycloelimination products. The absolute stereochemistry of the chiral cyclopropane was established by independent synthesis and X-ray crystal structure determination of a synthetic precursor. The distribution of decarbonylation and cycloelimination products was inversely dependent on the concentration of the substrate. Irradiation of the same ketone in tetrahydrofuran or benzene gave mostly cycloelimination products. Addition of Michler's ketone increased the ratio of photodecarbonylation, suggesting a triplet state pathway for this process. This was corroborated by the addition of dicyanoethylene, which showed significant quenching of photodecarbonylation. Irradiation of 2(S)-[(benzoyloxy)methyl]cyclobutane in acetone gave the corresponding cyclopropane as the principal product. Keywords: photodecarbonylation, chiral cyclopropanes, cyclobutanones, triplet sensitization.