性少妇freesexvideos荷兰,日本东京热无码视频免费,人妻av一区二区三区精品,少妇搡bbbb搡bbb搡爱恋,欧美极品少妇无套实战,丝袜高跟鞋国产av在线观看 ,无码任你躁久久久久久,男人添女人荫蒂视频观看,久久99热这里只有精品国产

{SA}

1. Vassiliki Theodorou, et al Tetrahedron 67 , 5630-5634, (2011)

{SA}

2. Fu-An Kang, et al Chem. Commun. 46 , 1347-1349, (2010)

{SA}

3. Fu-An Kang, et al J. Am. Chem. Soc. 130 , 1130-11302, (2008)

{SA}

4. Jordi Alsina, et al Lett. Pept. Sci. 6 , 243-245, (1999)

{SA}

5. J. Coste et al. J. Org. Chem. 59 , 2437, (1994)

{SA}

6. T. Kurome et al. Tetrahedron 52 , 4327, (1996)

{ALF} Efficient peptide coupling agent for N-methylated amino esters for which coupling with a number of conventional reagents has proved ineffective or slow, and giving superior results to 1H-Benzotriazol-1-yl­oxytri(1-pyrrolidinyl)­phosphonium hexafluorophosphate, B25251, in this type of reaction: J. Org. Chem., 59, 2437 (1994). See Appendix 6.

{ALF} Can also be used to activate formamides, e.g. reaction of DMF with primary amines to yield formamidines: Tetrahedron Lett., 40, 5487 (1999).