123973-57-9

Upstream product

• 6326-79-0 6-bromoisatin 
• 42839-50-9 (E)-6-bromo-3-ethoxycarbonylmethylene-2-oxoindoline 
• 123973-50-2 6'-bromo-1,2'-dihydro-6-methyl-2'-oxospiro<4-cyclohexene-1,3'-<3H>indole>-2-carboxylic acid 
• 123999-63-3 ethyl 6'-bromo-1',2'-dihydro-6-methyl-2'-oxospiro<4-cyclohexene-1,3'-<3H>indole>-2-carboxylate 
• 123973-51-3 2-(methylthio)ethyl 6'-bromo-1',2'-dihydro-6-methyl-2'-oxospiro<4-cyclohexene-1,3'-<3H>indole>-2-carboxylate 
• 143101-46-6 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-6-methyl-2'-oxospiro<4-cyclohexene-1,3'-<3H>indole>-2-carboxylate 
• 143101-47-7 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-3-hydroxymethyl-5-methyl-2'-oxospiro<3-cyclopentene-1,3'-<3H>indole>-2-carboxylate 
• 123973-53-5 2-(methylsulfonyl)ethyl 6'-bromo-3-formyl-1',2'-dihydro-5-methyl-2'-oxospiro<3-cyclopentene-1,3'-<3H>indole>-2-carboxylate 
• 123973-54-6 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-5-methyl-3-<<(methylsulfonyl)oxy>methyl>-2'-oxospiro<3-cyclopentene-1,3'-<3H>indole>-2-carboxylate 

Downstream Products

• 123973-59-1 2-(methylsulfonyl)ethyl 6'-bromo-4-<(chloroacetyl)oxy>-1',2'-dihydro-3-hydroxy-5-methyl-3-<<<5-nitro-2,6-bis(phenylmethoxy)-4-pyrimidinyl>amino>methyl>-2'-oxospiro-indole>-2-carboxylate 
• 123973-60-4 2-(methylsulfonyl)ethyl 6'-bromo-4-<(chloroacetyl)oxy>-1',2'-dihydro-5-methyl-3-<<<5-nitro-2,6-bis(phenylmethoxy)-4-pyrimidinyl>amino>methyl>-2'-oxospiro<2-cyclopentene-1,3'-<3H>indole>-2-carboxylate 
• 123973-61-5 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-5-hydroxy-5-methyl-3-<<<5-nitro-2,6-bis(phenylmethoxy)-4-pyrimidinyl>amino>methyl>-2',4'-dioxospiro<2-cyclopentene-1,3'-<3H>indole>-2-carboxylate 
• 124059-45-6 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-4-hydroxy-5-methyl-3-<<<5-nitro-2,6-bis(phenylmethoxy)-4-pyrimidinyl>amino>methyl>-2'-oxospiro<2-cyclopentene-1,3'-<3H>indole>-2-carboxylate 
• 109681-05-2 2-(methylsulfonyl)ethyl 6'-bromo-1',2',8,8a,9,10-hexahydro-6-hydroxy-6-methyl-2'-oxo-2,4-bis(phenylmethoxy)-spiropyrimido<4,5-b><1,4>diazepine-7(6H),3'-<3H>indole>-8-carboxylate 
• 109681-06-3 2-(methylsulfonyl)ethyl 1'-acetyl-6-(acetyloxy)-6'-bromo-1',2',8,8a,9,10-hexahydro-6-methyl-2'-oxo-2,4-bis(phenylmethoxy)spiropyrimido<4,5-b><1,4>diazepine-7(6H),3'-<3H>indole>-8-carboxylate 
• 123973-58-0 2-(methylsulfonyl)ethyl 6'-bromo-1',2'-dihydro-3,4-dihydroxy-5-methyl-3-<<<5-nitro-2,6-bis(phenylmethoxy)-4-pyrimidinyl>amino>methyl>-2'-oxospiroindole>-2-carboxylate 

Relevant academic research and scientific papers

Second approach to the construction of a pentacyclic ring system for neosurugatoxin

The Diels-Alder adduct obtained from (E)-6-bromo-3-ethoxycarbonylmethylene-2-oxoindoline and trans-1,3-pentadiene was successfully transformed into the diacetate of the aglycone of neosurugatoxin, which is the key intermediate in our first total synthesis