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Pseudoproline Dipeptides
Pseudoproline dipeptides contain oxazolidine rings formed from serine or threonine. As pseudoprolines theirselves show rather low-yield couplings, they are utilized as preformed dipeptides which prevent the formation of aggregation-prone secondary structures. Depending on the substitution pattern, cysteine pseudoprolines can be stable towards standard cleavage conditions of tBu/Boc. This fact opens new possibilities for working out a successful strategy for regiospecific disulfide bridge formation in synthesizing multi-cyclic peptides. In addition, pseudoproline-containing peptides typically benefit of enhanced solubilities and coupling efficiencies.
![Fmoc-L-Ala-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1450_1_13.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ala-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1000_8.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ala-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1140_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Arg(Pbf)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1590_2.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Arg(Pbf)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1600_16.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Asn(Trt)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1080_8.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Asn(Trt)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1220_7.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Asp(tBu)-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1470_12.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Asp(OtBu)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1010_8.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Asp(tBu)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1150_7.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Glu(tBu)-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1490_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Glu(tBu)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1090_11.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Glu(tBu)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1230_1.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Gln(Trt)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1020_9.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Gln(Trt)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1160_1.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-Gly-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1440_1_12.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-Gly-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1040_7.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-Gly-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1180_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ile-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1050_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Met-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1610_12.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Met-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1620_4.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Val-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1250_9.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ile-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1190_1_12.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Leu-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1510_11.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Leu-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1070_9.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Leu-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1210_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Lys(Boc)-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1520_11.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Lys(Boc)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1060_1_9.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Lys(Boc)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1200_1_8.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Phe-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1030_1.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Phe-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1170_1_11.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ser(tBu)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1100_7.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Ser(tBu)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1240_11.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Thr(tBu)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1420_10.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Trp(Boc)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1120_3.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Trp(Boc)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1260_1_14.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Tyr(tBu)-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1560_6.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Tyr(tBu)-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1130_1_14.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Tyr(tBu)-L-Thr[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1270_9.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Val-L-Cys[PSI(Dmp,H)pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1570_1_13.svg?width=240&height=300&store=en&image-type=small_image)
![Fmoc-L-Val-L-Ser[PSI(Me,Me)Pro]-OH](https://cdn.iris-biotech.de/media/catalog/product/P/S/PSI1110_8.svg?width=240&height=300&store=en&image-type=small_image)
