2,2,4,4-tetramethylcyclobutane-1 -one-3-thione

Table 5.2 [3+2] Cycloadducts derived from 2,2,4,4-tetramethylcyclobutane-1-one-3-thione S-methylide...

In a similar manner, 2,2,4,4-tetramethylcyclobutane-l-one-3-thione 5-methyUde 4 is obtained from the corresponding thiadiazoline precursor 3 at 40 °C and trapped with the dipoiarophiies a-b to give the [3-1-2] cycloadducts 5 listed in Table 5.2. ... 

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