中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 6α-bromopenicillanic acid methyl ester | 34800-34-5 | C9H12BrNO3S | 294.169 |
—— | methyl 6β-bromopenicillanate | 52354-06-0 | C9H12BrNO3S | 294.169 |
—— | 6-aminopenicillanic acid | —— | C8H12N2O3S | 216.261 |
6-氨基青霉烷酸 | 6-Aminopenicillanic Acid | 551-16-6 | C8H12N2O3S | 216.261 |
(2S-顺式)-6,6-二溴-3,3-二甲基-7-氧代-4-硫杂-1-氮杂双环[3.2.0]庚烷-2-羧酸甲酯 | methyl 6,6-dibromopenicillanate | 24138-27-0 | C9H11Br2NO3S | 373.065 |
[2S-(2alpha,5alpha,6alpha)]-6-溴-3,3-二甲基-7-氧代-4-硫杂-1-氮杂双环[3.2.0]庚烷-2-羧酸 | 6-bromopenicillanic acid | 24138-28-1 | C8H10BrNO3S | 280.142 |
6,6-二溴青霉烷酸 | 6,6-Dibromopenicillanic acid | 24158-88-1 | C8H9Br2NO3S | 359.038 |
—— | tert-butyl 2-<(4S)-5,5-dimethyl-4-methoxycarbonylthiazolidin-2-yl>-acetate | 125942-56-5 | C13H23NO4S | 289.396 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl (-)(2S,5S)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate | 110583-01-2 | C9H13NO3S | 215.273 |
—— | (2S,5R)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid methyl ester-4-oxide | 69126-86-9 | C9H13NO4S | 231.273 |
—— | methyl 6,6-dihydropenicillanate 1,1-dioxide | 65039-72-7 | C9H13NO5S | 247.272 |
Methyl penicillanate has been synthesized by condensation of D-penicillamine with three different variations of the synthon RO2CCH2CHO, followed by esterification of the resulting 4-carboxythiazolidine-2-acetic acid ester, removal of R, and Mukaiyama ring closure. The conditions for the synthesis of an analogous 4-carboxyoxazolidine-2-acetic acid ester, containing an N-benzoyl protecting group, have been worked out. The condensation of threonine with diethinylketone does not lead directly to a vinylogous oxapenam.
The benzoyloxylation of penicillin derivatives at C5, on treatment with t-butyl perbenzoate in the presence of a copper catalyst, is facilitated by a phthalimido group at C6 when the substituents on the lactam ring are in the cis orientation, but hindered when the groups are trans substituted. In the absence of a C6 substituent, a competing reaction occurs in which the thiazolidine ring is cleaved.