Table 1.

Synthesis of 2-(1-hydroxypropyn-2-yl)-1-vinylpyrroles 2a–j.

Entry	1-Vinylpyrrole-2-carbaldehyde 1	2-(1-Hydroxypropyn-2-yl)-1-vinylpyrrole 2	t, h	Yield, %
a			2	68
b			4	63
c			2.5	53
d			4	94
e			4	67
f			2.5	66
g			3	55
h			2.5	61
i			3	60
j			3.5	66