Table 1.

Yields of library compounds 10 after reverse phase preparative Mass Directed Fractionation (MDF)

Library analogs of 10
	Boronic Acids
		B1	B2	B3	B4	B5	B6*	B7	B8	B10
Acid Chlorides	A1	30	36	34	19	13	14	31	28	24
	A2	37	35	33	25	32	18	39	38	26
	A3	11	13	13	-	6	10	14	-	14
	A4	41	32	40	32	41	23	41	46	43
	A5	34	27	35	29	35	15	34	41	42
	A7	19	16	-	13	17	9	23	14	19
	A8	-	10	-	7	-	-	14	-	-
	A9	4		1	1	4	-	-	4	-
	A10	35	34	26	31	28	23	30	20	32
	A11	28	21	23	19	32	15	23	21	26
	A12	31	28	22	34	27	10	37	31	20
	A13	32	43	42	31	36	26	47	42	50
	A14	30	14	-	-	-	-	-	-	-

^*Compounds incorporating B6 were reprocessed by normal phase preparative TLC after MDF to attain 90% purity by HPLC.