2,2,5-Trisubstituted pyrrolidines are available from allylic pyroglutamates by Ireland–Claisen ester rearrangement followed by Eschenmoser sulfide contraction and reduction in a highly diastereoselective and efficient sequence. Some of the products from this sequence exhibit activity against S. aureus, but are much less active against E. coli.
## clewd修改版 v4.8(11) by tera
**claude-3-5-sonnet-20241022 error**:
404
```Not Found```
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